1
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Cardwell PA, Del Moro C, Murphy MP, Lapthorn AJ, Hartley RC. Human mitochondrial glutathione transferases: Kinetic parameters and accommodation of a mitochondria-targeting group in substrates. Bioorg Med Chem 2024; 104:117712. [PMID: 38593670 DOI: 10.1016/j.bmc.2024.117712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2024] [Revised: 04/01/2024] [Accepted: 04/01/2024] [Indexed: 04/11/2024]
Abstract
Glutathione-S-transferases are key to the cellular detoxification of xenobiotics and products of oxidative damage. GSTs catalyse the reaction of glutathione (GSH) with electrophiles to form stable thioether adducts. GSTK1-1 is the main GST isoform in the mitochondrial matrix, but the GSTA1-1 and GSTA4-4 isoforms are also thought to be in the mitochondria with their distribution altering in transformed cells, thus potentially providing a cancer specific target. A mitochondria-targeted version of the GST substrate 1-chloro-2,4-dinitrobenzene (CDNB), MitoCDNB, has been used to manipulate the mitochondrial GSH pool. To finesse this approach to target particular GST isoforms in the context of cancer, here we have determined the kcat/Km for the human isoforms of GSTK1-1, GSTA1-1 and GSTA4-4 with respect to GSH and CDNB. We show how the rate of the GST-catalysed reaction between GSH and CDNB analogues can be modified by both the electron withdrawing substituents, and by the position of the mitochondria-targeting triphenylphosphonium on the chlorobenzene ring to tune the activity of mitochondria-targeted substrates. These findings can now be exploited to selectively disrupt the mitochondrial GSH pools of cancer cells expressing particular GST isoforms.
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Affiliation(s)
- Patrick A Cardwell
- School of Chemistry, Joseph Black Building, University Avenue, University of Glasgow, Glasgow G12 8QQ, UK.
| | - Carlo Del Moro
- MRC Mitochondrial Biology Unit, University of Cambridge, Cambridge Biomedical Campus, Cambridge CB2 0XY, UK
| | - Michael P Murphy
- MRC Mitochondrial Biology Unit, University of Cambridge, Cambridge Biomedical Campus, Cambridge CB2 0XY, UK
| | - Adrian J Lapthorn
- School of Chemistry, Joseph Black Building, University Avenue, University of Glasgow, Glasgow G12 8QQ, UK
| | - Richard C Hartley
- School of Chemistry, Joseph Black Building, University Avenue, University of Glasgow, Glasgow G12 8QQ, UK.
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2
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Madusanka RK, Karunaweera ND, Silva H, Selvapandiyan A. Antimony resistance and gene expression in Leishmania: spotlight on molecular and proteomic aspects. Parasitology 2024; 151:1-14. [PMID: 38012864 PMCID: PMC10941051 DOI: 10.1017/s0031182023001129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 11/04/2023] [Accepted: 11/09/2023] [Indexed: 11/29/2023]
Abstract
Leishmaniasis is a vector-borne parasitic disease caused by Leishmania parasites with a spectrum of clinical manifestations, ranging from skin lesions to severe visceral complications. Treatment of this infection has been extremely challenging with the concurrent emergence of drug resistance. The differential gene expression and the discrepancies in protein functions contribute to the appearance of 2 distinct phenotypes: resistant and sensitive, but the current diagnostic tools fail to differentiate between them. The identification of gene expression patterns and molecular mechanisms coupled with antimony (Sb) resistance can be leveraged to prompt diagnosis and select the most effective treatment methods. The present study attempts to use comparative expression of Sb resistance-associated genes in resistant and sensitive Leishmania, to disclose their relative abundance in clinical or in vitro selected isolates to gain an understanding of the molecular mechanisms of Sb response/resistance. Data suggest that the analysis of resistance gene expression would verify the Sb resistance or susceptibility only to a certain extent; however, none of the individual expression patterns of the studied genes was diagnostic as a biomarker of Sb response of Leishmania. The findings highlighted will be useful in bridging the knowledge gap and discovering innovative diagnostic tools and novel therapeutic targets.
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Affiliation(s)
- Rajamanthrilage Kasun Madusanka
- Department of Parasitology, Faculty of Medicine, University of Colombo, No. 25, Kynsey Road, Colombo 8, Sri Lanka
- Department of Molecular Medicine, School of Interdisciplinary Sciences and Technology, Jamia Hamdard, New Delhi 110062, India
| | - Nadira D. Karunaweera
- Department of Parasitology, Faculty of Medicine, University of Colombo, No. 25, Kynsey Road, Colombo 8, Sri Lanka
| | - Hermali Silva
- Department of Parasitology, Faculty of Medicine, University of Colombo, No. 25, Kynsey Road, Colombo 8, Sri Lanka
| | - Angamuthu Selvapandiyan
- Department of Molecular Medicine, School of Interdisciplinary Sciences and Technology, Jamia Hamdard, New Delhi 110062, India
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3
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Horak I, Horn S, Pieters R. The benefit of using in vitro bioassays to screen agricultural samples for oxidative stress: South Africa's case. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART. B, PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES 2023; 58:689-710. [PMID: 37814453 DOI: 10.1080/03601234.2023.2264739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/11/2023]
Abstract
Applied pesticides end up in non-target environments as complex mixtures. When bioavailable, these chemicals pose a threat to living organisms and can induce oxidative stress (OS). In this article, attention is paid to OS and the physiological role of the antioxidant defense system. South African and international literature was reviewed to provide extensive evidence of pesticide-induced OS in non-target organisms, in vivo and in vitro. Although in vitro approaches are used internationally, South African studies have only used in vivo methods. Considering ethical implications, the authors support the use of in vitro bioassays to screen environmental matrices for their OS potential. Since OS responses are initiated and measurable at lower cellular concentrations compared to other toxicity endpoints, in vitro OS bioassays could be used as an early warning sign for the presence of chemical mixtures in non-target environments. Areas of concern in the country could be identified and prioritized without using animal models. The authors conclude that it will be worthwhile for South Africa to include in vitro OS bioassays as part of a battery of tests to screen environmental matrices for biological effects. This will facilitate the development and implementation of biomonitoring programs to safeguard the South African environment.
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Affiliation(s)
- Ilzé Horak
- Unit for Environmental Sciences and Management, North-West University, Potchefstroom, South Africa
- Occupational Hygiene and Health Research Initiative, North-West University, Potchefstroom, South Africa
| | - Suranie Horn
- Unit for Environmental Sciences and Management, North-West University, Potchefstroom, South Africa
- Occupational Hygiene and Health Research Initiative, North-West University, Potchefstroom, South Africa
| | - Rialet Pieters
- Unit for Environmental Sciences and Management, North-West University, Potchefstroom, South Africa
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4
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Blandino G, Fiorani M, Canonico B, De Matteis R, Guidarelli A, Montanari M, Buffi G, Coppo L, Arnér ESJ, Cantoni O. Clozapine suppresses NADPH oxidase activation, counteracts cytosolic H 2O 2, and triggers early onset mitochondrial dysfunction during adipogenesis of human liposarcoma SW872 cells. Redox Biol 2023; 67:102915. [PMID: 37866162 PMCID: PMC10623370 DOI: 10.1016/j.redox.2023.102915] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 09/29/2023] [Accepted: 10/01/2023] [Indexed: 10/24/2023] Open
Abstract
Long-term treatment of schizophrenia with clozapine (CLZ), an atypical antipsychotic drug, is associated with an increased incidence of metabolic disorders mediated by poorly understood mechanisms. We herein report that CLZ, while slowing down the morphological changes and lipid accumulation occurring during SW872 cell adipogenesis, also causes an early (day 3) inhibition of the expression/nuclear translocation of CAAT/enhancer-binding protein β and peroxisome proliferator-activated receptor γ. Under the same conditions, CLZ blunts NADPH oxidase-derived reactive oxygen species (ROS) by a dual mechanism involving enzyme inhibition and ROS scavenging. These effects were accompanied by hampered activation of the nuclear factor (erythroid-derived2)-like 2 (Nrf2)-dependent antioxidant responses compared to controls, and by an aggravated formation of mitochondrial superoxide. CLZ failed to exert ROS scavenging activities in the mitochondrial compartment but appeared to actively scavenge cytosolic H2O2 derived from mitochondrial superoxide. The early formation of mitochondrial ROS promoted by CLZ was also associated with signs of mitochondrial dysfunction. Some of the above findings were recapitulated using mouse embryonic fibroblasts. We conclude that the NADPH oxidase inhibitory and cytosolic ROS scavenging activities of CLZ slow down SW872 cell adipogenesis and suppress their Nrf2 activation, an event apparently connected with increased mitochondrial ROS formation, which is associated with insulin resistance and metabolic syndrome. Thus, the cellular events characterised herein may help to shed light on the more detailed molecular mechanisms explaining some of the adverse metabolic effects of CLZ.
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Affiliation(s)
- Giulia Blandino
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, Italy
| | - Mara Fiorani
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, Italy.
| | - Barbara Canonico
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, Italy
| | - Rita De Matteis
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, Italy
| | - Andrea Guidarelli
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, Italy
| | - Mariele Montanari
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, Italy
| | - Gloria Buffi
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, Italy
| | - Lucia Coppo
- Division of Biochemistry, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Elias S J Arnér
- Division of Biochemistry, Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden; Department of Selenoprotein Research and the National Tumor Biology Laboratory, National Institute of Oncology, Budapest, Hungary
| | - Orazio Cantoni
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Urbino, Italy
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5
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Anderson-Bain K, Roberts C, Kohlman E, Ji X, Alcaraz AJ, Miller J, Gangur-Powell T, Weber L, Janz D, Hecker M, Montina T, Brinkmann M, Wiseman S. Apical and mechanistic effects of 6PPD-quinone on different life-stages of the fathead minnow (Pimephales promelas). Comp Biochem Physiol C Toxicol Pharmacol 2023; 271:109697. [PMID: 37451416 DOI: 10.1016/j.cbpc.2023.109697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 06/26/2023] [Accepted: 07/09/2023] [Indexed: 07/18/2023]
Abstract
N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine-quinone (6PPD-quinone) is an emerging contaminant of concern that is generated through the environmental oxidation of the rubber tire anti-degradant 6PPD. Since the initial report of 6PPD-quinone being the cause of urban runoff mortality syndrome of Coho salmon, numerous species have been identified as either sensitive or insensitive to acute lethality caused by 6PPD-quinone. In sensitive species, acute lethality might be caused by uncoupling of mitochondrial respiration in gills. However, little is known about effects of 6PPD-quinone on insensitive species. Here we demonstrate that embryos of fathead minnows (Pimephales promelas) are insensitive to exposure to concentrations as great as 39.97 μg/L for 168 h, and adult fathead minnows are insensitive to exposure to concentrations as great as 9.4 μg/L for 96 h. A multi-omics approach using a targeted transcriptomics array, (EcoToxChips), and proton nuclear magnetic resonance (1H NMR) was used to assess responses of the transcriptomes and metabolomes of gills and livers from adult fathead minnows exposed to 6PPD-quinone for 96 h to begin to identify sublethal effects of 6PPD-quinone. There was little agreement between results of the EcoToxChip and metabolomics analyses, likely because genes present on the EcoToxChip were not representative of pathways suggested to be perturbed by metabolomic analysis. Changes in abundances of transcripts and metabolites in livers and gills suggest that disruption of one‑carbon metabolism and induction of oxidative stress might be occurring in gills and livers, but that tissues differ in their sensitivity or responsiveness to 6PPD-quinone. Overall, several pathways impacted by 6PPD-quinone were identified as candidates for future studies of potential sublethal effects of this chemical.
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Affiliation(s)
| | - Catherine Roberts
- Toxicology Centre, University of Saskatchewan, Saskatoon, SK S7N 5B3, Canada
| | - Evan Kohlman
- Toxicology Centre, University of Saskatchewan, Saskatoon, SK S7N 5B3, Canada
| | - Xiaowen Ji
- Toxicology Centre, University of Saskatchewan, Saskatoon, SK S7N 5B3, Canada
| | - Alper J Alcaraz
- Toxicology Centre, University of Saskatchewan, Saskatoon, SK S7N 5B3, Canada
| | - Justin Miller
- Department of Biological Sciences, University of Lethbridge, Lethbridge, AB T1K 3M4, Canada
| | - Tabitha Gangur-Powell
- Department of Chemistry and Biochemistry, University of Lethbridge, Lethbridge, AB T1K 3M4, Canada
| | - Lynn Weber
- Toxicology Centre, University of Saskatchewan, Saskatoon, SK S7N 5B3, Canada; Department of Veterinary Biomedical Sciences, Western College of Veterinary Medicine University of Saskatchewan, Saskatoon, SK S7N 5B4, Canada
| | - David Janz
- Toxicology Centre, University of Saskatchewan, Saskatoon, SK S7N 5B3, Canada; Department of Veterinary Biomedical Sciences, Western College of Veterinary Medicine University of Saskatchewan, Saskatoon, SK S7N 5B4, Canada
| | - Markus Hecker
- Toxicology Centre, University of Saskatchewan, Saskatoon, SK S7N 5B3, Canada; School of Environment and Sustainability (SENS), University of Saskatchewan, Saskatoon, SK S7N 5CN, Canada
| | - Tony Montina
- Department of Chemistry and Biochemistry, University of Lethbridge, Lethbridge, AB T1K 3M4, Canada; Southern Alberta Genome Sciences Centre, University of Lethbridge, Lethbridge, AB T1K 3M4, Canada
| | - Markus Brinkmann
- Toxicology Centre, University of Saskatchewan, Saskatoon, SK S7N 5B3, Canada; School of Environment and Sustainability (SENS), University of Saskatchewan, Saskatoon, SK S7N 5CN, Canada; Global Institute for Water Security (GIWS), University of Saskatchewan, Saskatoon, SK S7N 3H5, Canada.
| | - Steve Wiseman
- Department of Biological Sciences, University of Lethbridge, Lethbridge, AB T1K 3M4, Canada.
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Pruteanu LL, Bailey DS, Grădinaru AC, Jäntschi L. The Biochemistry and Effectiveness of Antioxidants in Food, Fruits, and Marine Algae. Antioxidants (Basel) 2023; 12:antiox12040860. [PMID: 37107235 PMCID: PMC10135154 DOI: 10.3390/antiox12040860] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Revised: 03/30/2023] [Accepted: 03/31/2023] [Indexed: 04/05/2023] Open
Abstract
It is more effective to maintain good health than to regain it after losing it. This work focuses on the biochemical defense mechanisms against free radicals and their role in building and maintaining antioxidant shields, aiming to show how to balance, as much as possible, the situations in which we are exposed to free radicals. To achieve this aim, foods, fruits, and marine algae with a high antioxidant content should constitute the basis of nutritional elements, since natural products are known to have significantly greater assimilation efficiency. This review also gives the perspective in which the use of antioxidants can extend the life of food products, by protecting them from damage caused by oxidation as well as their use as food additives.
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Affiliation(s)
- Lavinia Lorena Pruteanu
- Department of Chemistry and Biology, North University Center at Baia Mare, Technical University of Cluj-Napoca, 430122 Baia Mare, Romania
- Research Center for Functional Genomics, Biomedicine and Translational Medicine, “Iuliu Hațieganu” University of Medicine and Pharmacy, 400337 Cluj-Napoca, Romania
| | - David Stanley Bailey
- IOTA Pharmaceuticals Ltd., St Johns Innovation Centre, Cowley Road, Cambridge CB4 0WS, UK
| | - Andrei Cristian Grădinaru
- Department of Genetics, Faculty of Veterinary Medicine, “Ion Ionescu de la Brad” University of Life Sciences of Iaşi, 700490 Iaşi, Romania
| | - Lorentz Jäntschi
- Institute of Doctoral Studies, Babeş-Bolyai University, 400084 Cluj-Napoca, Romania
- Department of Physics and Chemistry, Technical University of Cluj-Napoca, 400114 Cluj-Napoca, Romania
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7
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Dental Caries and Salivary Oxidative Stress: Global Scientific Research Landscape. Antioxidants (Basel) 2023; 12:antiox12020330. [PMID: 36829890 PMCID: PMC9952432 DOI: 10.3390/antiox12020330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Revised: 01/18/2023] [Accepted: 01/18/2023] [Indexed: 02/04/2023] Open
Abstract
This study aimed to analyze the research trends on salivary oxidative stress associated with dental caries and to perform bibliometric approaches for existing publications on this association. A search was performed using the Web of Science Core Collection, without any restriction of language or publication year. The number of periodicals with the most published articles in this theme, most published authors and keywords were mapped; other metrics were also evaluated such as the countries that have more research on the subject and the period in which there were more publications on the subject. During the knowledge mapping, the most frequent experimental designs were analyzed, type of saliva collection, stage of caries disease, evaluated oxidative parameters were retrieved and analyzed from each manuscript. Between the 43 selected articles, the Journal of Clinical Pediatric Dentistry was the periodical appearing the most with 4 published articles. The authors who published the most were Celec, P., Tothova, L., Hegde, A.M., Shetty, S., Antoniali, C., and Pessan, JP with three articles each, and a total of 180 keywords representing the evolution of the theme. India and Asia were found to be the country and continent with most publications, respectively. Most articles collected non-stimulated total saliva, with total antioxidant capacity being the parameter most often evaluated. The type of study that appeared the most was cross-sectional studies, and articles published in the period of 2017-2022 were the most frequent. Studies show that dental caries can be associated to the changes in salivary oxidative biochemistry with an increase in lipid peroxidation, a biomarker of oxidative damage, and an increase in antioxidant capacity in chronic caries, in response to cariogenic challenge. Some studies evidence the reduction of lipid peroxidation after treatment of the carious lesion. Our findings reveal worldwide research trends, as well as a clearer knowledge of the evolution and future scenarios of this issue, also showing the mechanisms associating dental caries with changes in salivary oxidative biochemical parameters are not clear.
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Are Dental Caries Associated with Oxidative Stress in Saliva in Children and Adolescents? A Systematic Review. Metabolites 2022; 12:metabo12090858. [PMID: 36144263 PMCID: PMC9502212 DOI: 10.3390/metabo12090858] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 08/05/2022] [Accepted: 08/12/2022] [Indexed: 11/17/2022] Open
Abstract
Background: This systematic review aimed to assess whether dental caries is associated with oxidative salivary stress. Methods: The searches were carried out in electronic databases, including PubMed, Scopus, Web of Science, the Cochrane Library, LILACS, OpenGrey, and Google Scholar, without restrictions on the date of publication and language. The acronym PECO was used, in which the participants (P) were children and adolescents exposed (E) to dental caries compared (C) to those without dental caries, with the outcome (O) of modulation of oxidative biochemical parameters. After the search retrieval, the duplicates were removed, and the articles were evaluated by title and abstract, following the inclusion and exclusion criteria. Then, the papers were read and thoroughly assessed. After selection, the risk of bias assessment and qualitative synthesis were performed using the Newcastle-Ottawa Scale (NOS) for observational studies. The Grading of Recommendations, Assessment, Development, and Evaluation (GRADE) tool was used to assess the level of evidence. Results: A total of 5790 studies were found, and 30 articles were considered eligible and were included for the qualitative synthesis and the level of evidence assessment. The studies showed an imbalance of the antioxidant and pro-oxidant parameters in individuals with dental caries, with primarily increases in both total antioxidant capacity and lipid peroxidation. Most articles showed a low risk of bias, having comparability as the main issue. When exploring through GRADE, a very low level of evidence was found. Conclusions: It was possible to observe an association between oxidative stress and dental caries, showing a disbalance of antioxidants and pro-oxidants, but the evidence level was still very low.
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Jiang C, Dong Q, Xin X, Degen AA, Ding L. Effect of Chinese Herbs on Serum Biochemical Parameters, Immunity Indices, Antioxidant Capacity and Metabolomics in Early Weaned Yak Calves. Animals (Basel) 2022; 12:ani12172228. [PMID: 36077948 PMCID: PMC9455063 DOI: 10.3390/ani12172228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Revised: 08/25/2022] [Accepted: 08/26/2022] [Indexed: 11/16/2022] Open
Abstract
Chinese traditional herbs are used widely as feed supplements to improve the immune response and antioxidant capacity of livestock. Twenty early-weaned 4-month-old yak calves (72.3 ± 3.65 kg) were divided randomly into four groups (n = 5 per group); three groups were provided with supplementary 80 mL/kg DMI of the root water extracts of either Angelica sinensis, Codonopsis pilosula or Glycyrrhiza uralensis, and one group (control) was not provided with a supplement. Compared to control calves, calves consuming the three herbal extracts increased serum concentrations of albumin (ALB) and glutathione peroxidase (GSH-Px), but decreased serum concentrations of free fatty acids (FFAs) and malondialdehyde (MDA) (p < 0.05). Calves consuming A. sinensis decreased (p < 0.05) serum concentration of total cholesterol (TC), and increased (p < 0.05) serum concentration of total proteins (TP). Serum FFA concentrations increased (p = 0.004) linearly with time in the control group, but not in the groups consuming herbs. Serum metabolomic data demonstrated that A. sinensis and C. pilosula regulate mainly amino acid metabolism, while G. uralensis regulates mainly carbon and amino acid metabolism. It was concluded that the three herbal root extracts, as dietary supplements, improved energy and nitrogen metabolism, and enhanced the antioxidant capacity of yak calves.
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Affiliation(s)
- Cuixia Jiang
- State Key Laboratory of Grassland Agro-ecosystem, College of Ecology, Lanzhou University, Lanzhou 730000, China
| | - Quanmin Dong
- Qinghai Provincial Key Laboratory of Adaptive Management on Alpine Grassland, Qinghai University, Xining 810016, China
| | - Xiaoping Xin
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Abraham Allan Degen
- Desert Animal Adaptations and Husbandry, Wyler Department of Dryland Agriculture, Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel
| | - Luming Ding
- Institute of Qinghai-Tibetan Plateau, Southwest Minzu University, Chengdu 610041, China
- Correspondence:
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Tyulenev AV, Smirnova GV, Muzyka NG, Oktyabrsky ON. Study of the early response of Escherichia coli lpcA and ompF mutants to ciprofloxacin. Res Microbiol 2022; 173:103954. [PMID: 35568342 DOI: 10.1016/j.resmic.2022.103954] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 04/18/2022] [Accepted: 04/29/2022] [Indexed: 02/07/2023]
Abstract
In most previous studies the sensitivity of Escherichia coli outer membrane mutants to ciprofloxacin (CF) was studied by MIC method. In the present work, the early response of these mutants to CF was studied using physiological and biochemical methods and electrochemical sensors. The use of sensors made it possible to monitor dissolved oxygen, potassium and extracellular sulfide continuously directly in growing cultures in real time. In the absence of CF, no significant differences were found between the mutants deficient in porin OmpF and lipopolysaccharide (LPS) and the parent. The only exception was 5-6 times higher extracellular glutathione and 1.5-3 times lower intracellular glutathione in the lpcA compared to the parent and the ompF. Ciprofloxacin inhibited growth, respiration, membrane potential and K+ consumption, which was less pronounced in both mutants compared to the parent. Changes in these parameters correlated with each other, but not with survival. A reversible increase in sulfide level was observed at 3 μg ml-1 CF in the parent, at 20 μg ml-1 CF in ompF and was absent in lpcA at all concentrations. The data obtained show that the use of electrochemical sensors can provide a more complete understanding of the early response of bacteria to CF.
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Affiliation(s)
- Alexey V Tyulenev
- Institute of Ecology and Genetics of Microorganisms, Perm Federal Research Center, Russian Academy of Sciences, Golev street 13, 614081 Perm, Russia.
| | - Galina V Smirnova
- Institute of Ecology and Genetics of Microorganisms, Perm Federal Research Center, Russian Academy of Sciences, Golev street 13, 614081 Perm, Russia.
| | - Nadezda G Muzyka
- Institute of Ecology and Genetics of Microorganisms, Perm Federal Research Center, Russian Academy of Sciences, Golev street 13, 614081 Perm, Russia.
| | - Oleg N Oktyabrsky
- Institute of Ecology and Genetics of Microorganisms, Perm Federal Research Center, Russian Academy of Sciences, Golev street 13, 614081 Perm, Russia.
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11
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Kashirina DN, Brzhozovskiy AG, Sun W, Pastushkova LK, Popova OV, Rusanov VB, Nikolaev EN, Larina IM, Kononikhin AS. Proteomic Characterization of Dry Blood Spots of Healthy Women During Simulation the Microgravity Effects Using Dry Immersion. Front Physiol 2022; 12:753291. [PMID: 35087415 PMCID: PMC8787266 DOI: 10.3389/fphys.2021.753291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 09/22/2021] [Indexed: 11/13/2022] Open
Affiliation(s)
- Daria N. Kashirina
- Institute of Biomedical Problems – Russian Federation State Scientific Research Center, Russian Academy of Sciences, Moscow, Russia
| | - Alexander G. Brzhozovskiy
- Institute of Biomedical Problems – Russian Federation State Scientific Research Center, Russian Academy of Sciences, Moscow, Russia
- CDISE, Skolkovo Institute of Science and Technology, Moscow, Russia
| | - Wen Sun
- Institute of Biomedical Problems – Russian Federation State Scientific Research Center, Russian Academy of Sciences, Moscow, Russia
| | - Ludmila Kh. Pastushkova
- Institute of Biomedical Problems – Russian Federation State Scientific Research Center, Russian Academy of Sciences, Moscow, Russia
| | - Olga V. Popova
- Institute of Biomedical Problems – Russian Federation State Scientific Research Center, Russian Academy of Sciences, Moscow, Russia
| | - Vasiliy B. Rusanov
- Institute of Biomedical Problems – Russian Federation State Scientific Research Center, Russian Academy of Sciences, Moscow, Russia
| | | | - Irina M. Larina
- Institute of Biomedical Problems – Russian Federation State Scientific Research Center, Russian Academy of Sciences, Moscow, Russia
| | - Alexey S. Kononikhin
- Institute of Biomedical Problems – Russian Federation State Scientific Research Center, Russian Academy of Sciences, Moscow, Russia
- CDISE, Skolkovo Institute of Science and Technology, Moscow, Russia
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12
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Huang Y, Xie Y, Yang D, Xiong M, Chen X, Wu D, Wang Q, Chen H, Zheng L, Huang K. Histone demethylase UTX aggravates acetaminophen overdose induced hepatotoxicity through dual mechanisms. Pharmacol Res 2022; 175:106021. [PMID: 34883214 DOI: 10.1016/j.phrs.2021.106021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 11/21/2021] [Accepted: 12/03/2021] [Indexed: 11/25/2022]
Abstract
Acetaminophen (APAP) overdose is a major cause of acute liver failure, while the underlying mechanisms of APAP hepatotoxicity are not fully understood. Recently, emerging evidence suggests that epigenetic enzymes play roles in APAP-induced liver injury. Here, we found that Utx (ubiquitously transcribed tetratricopeptide repeat, X chromosome, also known as KDM6A), a X-linked histone demethylase which removes the di- and tri-methyl groups from histone H3K27, was markedly induced in the liver of APAP-overdosed female mice. Hepatic deletion of Utx suppressed APAP overdose-induced hepatotoxicity in female but not male mice. RNA-sequencing analysis suggested that Utx deficiency in female mice upregulated antitoxic phase II conjugating enzymes, including sulfotransferase family 2 A member 1 (Sult2a1), thus reduces the amount of toxic APAP metabolites in injured liver; while Utx deficiency also alleviated ER stress through downregulating transcription of ER stress genes including Atf4, Atf3, and Chop. Mechanistically, Utx promoted transcription of ER stress related genes in a demethylase activity-dependent manner, while repressed Sult2a1 expression through mediating H3K27ac levels independent of its demethylase activity. Moreover, overexpression of Sult2a1 in the liver of female mice rescued APAP-overdose induced liver injury. Together, our results indicated a novel UTX-Sult2a1 axis for the prevention or treatment of APAP-induced liver injury.
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Affiliation(s)
- Yixue Huang
- Tongji School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Yunhao Xie
- Hubei Key Laboratory of Cell Homeostasis, Frontier Science Center for Immunology and Metabolism, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Dong Yang
- Tongji School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Mingrui Xiong
- Tongji School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Xingrui Chen
- Hubei Key Laboratory of Cell Homeostasis, Frontier Science Center for Immunology and Metabolism, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Di Wu
- Hubei Key Laboratory of Cell Homeostasis, Frontier Science Center for Immunology and Metabolism, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Qing Wang
- Hubei Key Laboratory of Cell Homeostasis, Frontier Science Center for Immunology and Metabolism, College of Life Sciences, Wuhan University, Wuhan 430072, China
| | - Hong Chen
- Tongji School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Ling Zheng
- Hubei Key Laboratory of Cell Homeostasis, Frontier Science Center for Immunology and Metabolism, College of Life Sciences, Wuhan University, Wuhan 430072, China.
| | - Kun Huang
- Tongji School of Pharmacy, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China.
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13
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Poltorack CD, Dixon SJ. Understanding the role of cysteine in ferroptosis: progress & paradoxes. FEBS J 2022; 289:374-385. [PMID: 33773039 PMCID: PMC8473584 DOI: 10.1111/febs.15842] [Citation(s) in RCA: 47] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Cysteine is a conditionally essential amino acid required for the synthesis of proteins and many important intracellular metabolites. Cysteine depletion can trigger iron-dependent nonapoptotic cell death-ferroptosis. Despite this, cysteine itself is normally maintained at relatively low levels within the cell, and many mechanisms that could act to buffer cysteine depletion do not appear to be especially effective or active, at least in cancer cells. How do we reconcile these seemingly paradoxical features? Here, we describe the regulation of cysteine and its contribution to ferroptosis and speculate about how the levels of this amino acid are controlled to govern nonapoptotic cell death.
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Affiliation(s)
| | - Scott J. Dixon
- Department of Biology, Stanford University, Stanford, CA 94305, USA,Corresponding author:
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14
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Demerdash HM. Weight regain after bariatric surgery: Promoters and potential predictors. World J Meta-Anal 2021; 9:438-454. [DOI: 10.13105/wjma.v9.i5.438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 06/07/2021] [Accepted: 09/17/2021] [Indexed: 02/06/2023] Open
Abstract
Obesity is globally viewed as chronic relapsing disease. Bariatric surgery offers the most efficient and durable weight loss approach. However, weight regain after surgery is a distressing issue as obesity can revert. Surgical procedures were originally designed to reduce food intake and catalyze weight loss, provided that its role is marginalized in long-term weight maintenance. Consequently, it is essential to establish a scientifically standardized applicable definitions for weight regain, which necessitates enhanced comprehension of the clinical situation, as well as have realistic expectations concerning weight loss. Moreover, several factors are proposed to influence weight regain as psychological, behavioral factors, hormonal, metabolic, anatomical lapses, as well as genetic predisposition. Recently, there is a growing evidence of utilization of scoring system to anticipate excess body weight loss, along with characterizing certain biomarkers that identify subjects at risk of suboptimal weight loss after surgery. Furthermore, personalized counseling is warranted to help select bariatric procedure, reinforce self-monitoring skills, motivate patient, encourage mindful eating practices, to avoid recidivism.
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Affiliation(s)
- Hala Mourad Demerdash
- Department of Clinical Pathology, Alexandria University Hospitals, Alexandria 21311, Egypt
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15
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Gao W, Zhang T, Wu H. Emerging Pathological Engagement of Ferroptosis in Gut Diseases. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:4246255. [PMID: 34733403 PMCID: PMC8560274 DOI: 10.1155/2021/4246255] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 10/06/2021] [Indexed: 02/08/2023]
Abstract
Inflammatory bowel disease (IBD), including ulcerative colitis and Crohn's disease, is mainly characterized by chronic and progressive inflammation that damages the gastrointestinal mucosa. Increasing studies have enlightened that dysregulated cell death occurs in the inflamed sites, leading to the disruption of the intestinal barrier and aggravating inflammatory response. Ferroptosis, a newly characterized form of regulated cell death, is driven by the lethal accumulation of lipid peroxides catalyzed by cellular free iron. It has been widely documented that the fundamental features of ferroptosis, including iron deposition, GSH exhaustion, GPX4 inactivation, and lipid peroxidation, are manifested in the injured gastrointestinal tract in IBD patients. Furthermore, manipulation of the critical ferroptotic genes could alter the progression, severity, or even morbidity of the experimental colitis. Herein, we critically summarize the recent advances in the field of ferroptosis, focusing on interpreting the potential engagement of ferroptosis in the pathogenesis of IBD. Moreover, we are attempting to shed light on a perspective insight into the possibility of targeting ferroptosis as novel therapeutic designs for the clinical intervention of these gastrointestinal diseases.
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Affiliation(s)
- Weihua Gao
- Hubei Hongshan Laboratory, Wuhan, Hubei 430070, China
- State Key Laboratory of Agricultural Microbiology, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
- Interdisciplinary Sciences Institute, Huazhong Agricultural University, Wuhan, Hubei 430070, China
| | - Ting Zhang
- Hubei Hongshan Laboratory, Wuhan, Hubei 430070, China
- Interdisciplinary Sciences Institute, Huazhong Agricultural University, Wuhan, Hubei 430070, China
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
| | - Hao Wu
- Hubei Hongshan Laboratory, Wuhan, Hubei 430070, China
- Interdisciplinary Sciences Institute, Huazhong Agricultural University, Wuhan, Hubei 430070, China
- State Key Laboratory of Agricultural Microbiology, College of Veterinary Medicine, Huazhong Agricultural University, Wuhan 430070, China
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16
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Mitchell SC. Nutrition and sulfur. ADVANCES IN FOOD AND NUTRITION RESEARCH 2021; 96:123-174. [PMID: 34112351 DOI: 10.1016/bs.afnr.2021.02.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Sulfur is unusual in that it is a mineral that may be taken into the body in both inorganic and organic combinations. It has been available within the environment throughout the development of lifeforms and as such has become integrated into virtually every aspect of biochemical function. It is essential for the nature and maintenance of structure, assists in communication within the organism, is vital as a catalytic assistant in intermediary metabolism and the mechanism of energy flow as well as being involved in internal defense against potentially damaging reactive species and invading foreign chemicals. Recent studies have suggested extended roles for sulfur-containing molecules within living systems. As such, questions have been raised as to whether or not humans are receiving sufficient sulfur within their diet. Sulfur appears to have been the "poor relation" with regards to mineral nutrition. This may be because of difficulties encountered over its multifarious functions, the many chemical guises in which it may be ingested and its complex biochemical interconversions once taken into the body. No established daily requirements have been determined, unlike many minerals, although suggestions have been proposed. Owing to its widespread distribution within dietary components its intake has almost been taken for granted. In the majority of individuals partaking of a balanced diet the supply is deemed adequate, but those opting for specialized or restrictive diets may experience occasional and low-level shortages. In these instances, the careful use of sulfur supplements may be of benefit.
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Affiliation(s)
- Stephen C Mitchell
- Faculty of Medicine, Imperial College London, London, England, United Kingdom.
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17
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Zhang F, Shao C, Chen Z, Li Y, Jing X, Huang Q. Low Dose of Trichostatin A Improves Radiation Resistance by Activating Akt/Nrf2-Dependent Antioxidation Pathway in Cancer Cells. Radiat Res 2021; 195:366-377. [PMID: 33513620 DOI: 10.1667/rade-20-00145.1] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Accepted: 01/05/2020] [Indexed: 11/03/2022]
Abstract
Numerous studies have shown that histone deacetylase inhibitors (HDACis) improve cellular acetylation while also enhancing the radiation sensitivity. In this work, however, we confirmed that low-dose trichostatin A (TSA) as a typical HDACi could reduce rather than increase the radiosensitivity of cancer cells, while the cellular acetylation was also increased with TSA-induced epigenetic modification. The surviving fraction of HeLa/HepG2 cells pretreated with 25 nM TSA for 24 h was higher at 1 Gy/2 Gy of γ-ray radiation than that of the cells with the same radiation dose but without TSA pretreatment. To understand the underlying mechanism, we investigated the effect of low-dose TSA on HO-1, SOD and CAT induction and activating Akt together with its downstream Nrf2 signaling pathway. Our results indicated that TSA activated HO-1, SOD and CAT expression by increasing the phosphorylation level of Nrf2 in an Akt-dependent manner. In addition, we also observed that the 25-nM-TSA-pretreated group showed a significant increase in the antioxidant capacity in terms of SOD and CAT activities. Therefore, our results suggest that low-dose TSA can activate the Akt/Nrf2 pathway and upregulate expression of HO-1, SOD and CAT to stimulate the cellular defense mechanism. This work demonstrates that low-dose TSA treatment may activate the adaptation mechanism against the oxidative stress induced by ionizing radiation, and application of HDACi treatment should be undertaken with caution to avoid its possible radioresistance in radiotherapy.
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Affiliation(s)
- Fengqiu Zhang
- CAS Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Institute of Intelligent Machines, HFIPS, Chinese Academy of Sciences, Hefei, 230031, China.,Henan Key Laboratory of Ion-beam Bioengineering, School of Physics, Zhengzhou University, Zhengzhou, 450052, China
| | - Changsheng Shao
- CAS Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Institute of Intelligent Machines, HFIPS, Chinese Academy of Sciences, Hefei, 230031, China.,Science Island Branch of Graduate School, University of Science and Technology of China, Hefei, 230026, China
| | - Zhu Chen
- CAS Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Institute of Intelligent Machines, HFIPS, Chinese Academy of Sciences, Hefei, 230031, China.,Science Island Branch of Graduate School, University of Science and Technology of China, Hefei, 230026, China
| | - Yalin Li
- Henan Key Laboratory of Ion-beam Bioengineering, School of Physics, Zhengzhou University, Zhengzhou, 450052, China
| | - Xumiao Jing
- Henan Key Laboratory of Ion-beam Bioengineering, School of Physics, Zhengzhou University, Zhengzhou, 450052, China
| | - Qing Huang
- CAS Key Laboratory of High Magnetic Field and Ion Beam Physical Biology, Institute of Intelligent Machines, HFIPS, Chinese Academy of Sciences, Hefei, 230031, China.,Science Island Branch of Graduate School, University of Science and Technology of China, Hefei, 230026, China
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18
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Kim HH, Choi SE, Jeong WI. Oxidative stress and glutamate excretion in alcoholic steatosis: Metabolic synapse between hepatocyte and stellate cell. Clin Mol Hepatol 2020; 26:697-704. [PMID: 33053940 PMCID: PMC7641576 DOI: 10.3350/cmh.2020.0152] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Accepted: 08/27/2020] [Indexed: 12/12/2022] Open
Abstract
Chronic alcohol consumption induces the development of alcoholic steatosis in the liver, which is one of the most widespread liver diseases worldwide. During general alcohol metabolism, hepatocytes generate mitochondria- and cytochrome P450 2E1 (CYP2E1)-mediated reactive oxygen species (ROS) whose accumulation elicits activation of the hepatic anti-oxidant system, including glutathione (GSH). However, chronic alcohol consumption decreases GSH generation through cysteine deficiency by suppressing the methionine cycle and trans-sulfuration system, whereas it turns on an alternative defense pathway, such as the xCT transporter, to compensate for GSH shortage. The xCT transporter mediates the uptake of cystine coupled to the efflux of glutamate, leading to an increase in blood glutamate. In response to the elevated glutamate in the liver, the expression of metabotropic glutamate receptor 5 (mGluR5) is up-regulated in hepatic stellate cells (HSCs) along with enhanced production of 2-arachidonoylglycerol, which in turn stimulates cannabinoid receptor 1 (CB1R) on neighboring hepatocytes to increase de novo lipogenesis. On the other hand, blockade of mGluR5 and CB1R attenuates alcoholic steatosis. Interestingly, although the increased expression of CYP2E1-mediated xCT and ROS generation are mainly observed at the perivenous area (zone 3), fat accumulation is mostly detected at hepatic zone 2. To resolve this discrepancy, this review summarizes recent advances on glutamate/mGluR5-derived alcoholic steatosis and zone-dependently different responses to alcohol intake. In addition, the bidirectional loop pathway and its unique metabolic synapse between hepatocytes and HSCs are discussed.
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Affiliation(s)
- Hee-Hoon Kim
- Lab of Liver Research, Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea
| | - Sung Eun Choi
- Lab of Liver Research, Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea
| | - Won-Il Jeong
- Lab of Liver Research, Graduate School of Medical Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Korea
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19
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Magnuson AD, Liu G, Sun T, Tolba SA, Xi L, Whelan R, Lei XG. Supplemental methionine and stocking density affect antioxidant status, fatty acid profiles, and growth performance of broiler chickens. J Anim Sci 2020; 98:5811254. [PMID: 32207523 DOI: 10.1093/jas/skaa092] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Accepted: 03/19/2020] [Indexed: 01/13/2023] Open
Abstract
Broilers stocked in high densities may be prone to oxidative and inflammatory insults, resulting in impaired health status, growth performance, and meat quality. This study was to determine if 30% extra supplemental dl-methionine alleviated or prevented those adverse effects of a higher stocking density in broiler chickens. A total of 560 male Cornish Cross cockerels (day old) were divided into four groups: two stocking densities (9 and 12 birds/m2) and two supplementations of methionine (grower: 2.90 or 3.77 g/kg and finisher: 2.60 or 3.38 g/kg). Growth performance was recorded weekly. Blood and tissues were sampled at the end of each period. High stocking density decreased (P < 0.05) body weight and growth performance of growers and (or) finishers. Those differences were partially attenuated by the extra methionine supplementation. The high methionine elevated (P < 0.05) glutathione (GSH) concentration in the thigh at both ages (> 24%). The high stocking density elevated (>28%, P < 0.05) glutathione concentration in the plasma, breast, and thigh of growers, but decreased (P < 0.05) it in the liver of growers and thigh of finishers. Interaction effects (P < 0.05) between dietary methionine and stocking density were found on activities of the antioxidant enzyme glutathione S-transferase in the liver of growers and breast, thigh, and adipose tissue of finishers. The interaction effect was also found on activities of glutathione peroxidase and superoxide dismutase in the thigh of growers. The extra methionine decreased (P < 0.05) hepatic gene expression of heat shock protein 90 (18%) and thigh and breast malondialdehyde concentrations of the finishers (35%). In conclusion, the 30% extra dl-methionine supplementation was able to partially mitigate adverse effects caused by the higher stocking density and to improve the redox status of the broilers.
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Affiliation(s)
| | - Guanchen Liu
- Department of Animal Science, Cornell University, Ithaca, NY
| | - Tao Sun
- Department of Animal Science, Cornell University, Ithaca, NY
| | - Samar A Tolba
- Department of Animal Science, Cornell University, Ithaca, NY
| | - Lin Xi
- Department of Animal Science, North Carolina State University, Raleigh, NC
| | - Rose Whelan
- Evonik Nutrition & Care GmbH, Hanau, Germany
| | - Xin Gen Lei
- Department of Animal Science, Cornell University, Ithaca, NY
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20
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Patten DA, McGuirk S, Anilkumar U, Antoun G, Gandhi K, Parmar G, Iqbal MA, Wong J, Richardson RB, St-Pierre J, Slack RS, Harper ME. Altered mitochondrial fusion drives defensive glutathione synthesis in cells able to switch to glycolytic ATP production. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2020; 1868:118854. [PMID: 32926942 DOI: 10.1016/j.bbamcr.2020.118854] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 09/08/2020] [Accepted: 09/09/2020] [Indexed: 01/05/2023]
Abstract
Mitochondria are highly dynamic organelles. Alterations in mitochondrial dynamics are causal or are linked to numerous neurodegenerative, neuromuscular, and metabolic diseases. It is generally thought that cells with altered mitochondrial structure are prone to mitochondrial dysfunction, increased reactive oxygen species generation and widespread oxidative damage. The objective of the current study was to investigate the relationship between mitochondrial dynamics and the master cellular antioxidant, glutathione (GSH). We reveal that mouse embryonic fibroblasts (MEFs) lacking the mitochondrial fusion machinery display elevated levels of GSH, which limits oxidative damage. Moreover, targeted metabolomics and 13C isotopic labeling experiments demonstrate that cells lacking the inner membrane fusion GTPase OPA1 undergo widespread metabolic remodeling altering the balance of citric acid cycle intermediates and ultimately favoring GSH synthesis. Interestingly, the GSH precursor and antioxidant n-acetylcysteine did not increase GSH levels in OPA1 KO cells, suggesting that cysteine is not limiting for GSH production in this context. Post-mitotic neurons were unable to increase GSH production in the absence of OPA1. Finally, the ability to use glycolysis for ATP production was a requirement for GSH accumulation following OPA1 deletion. Thus, our results demonstrate a novel role for mitochondrial fusion in the regulation of GSH synthesis, and suggest that cysteine availability is not limiting for GSH synthesis in conditions of mitochondrial fragmentation. These findings provide a possible explanation for the heightened sensitivity of certain cell types to alterations in mitochondrial dynamics.
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Affiliation(s)
- David A Patten
- University of Ottawa, Faculty of Medicine, Department of Biochemistry Microbiology and Immunology, Ottawa, ON, K1H 8M5, Canada; Canadian Nuclear Laboratories (CNL), Radiobiology and Health Branch, Chalk River Laboratories, Chalk River, ON K0J 1J0, Canada; Ottawa Institute of Systems Biology, Ottawa K1H 8M5, Canada
| | - Shawn McGuirk
- McGill University, Department of Biochemistry, Montreal, QC H3G 1Y6, Canada
| | - Ujval Anilkumar
- University of Ottawa, Faculty of Medicine, Department of Cellular and Molecular Medicine, Ottawa, ON K1H 8M5, Canada
| | - Ghadi Antoun
- University of Ottawa, Faculty of Medicine, Department of Biochemistry Microbiology and Immunology, Ottawa, ON, K1H 8M5, Canada
| | - Karan Gandhi
- University of Ottawa, Faculty of Medicine, Department of Biochemistry Microbiology and Immunology, Ottawa, ON, K1H 8M5, Canada
| | - Gaganvir Parmar
- University of Ottawa, Faculty of Medicine, Department of Biochemistry Microbiology and Immunology, Ottawa, ON, K1H 8M5, Canada; Ottawa Institute of Systems Biology, Ottawa K1H 8M5, Canada
| | - Mohamed Ariff Iqbal
- University of Ottawa, Faculty of Medicine, Department of Cellular and Molecular Medicine, Ottawa, ON K1H 8M5, Canada
| | - Jacob Wong
- University of Ottawa, Faculty of Medicine, Department of Cellular and Molecular Medicine, Ottawa, ON K1H 8M5, Canada
| | - Richard B Richardson
- Canadian Nuclear Laboratories (CNL), Radiobiology and Health Branch, Chalk River Laboratories, Chalk River, ON K0J 1J0, Canada; McGill Medical Physics Unit, Cedars Cancer Centre - Glen Site, Montreal, QC H4A 3J1, Canada
| | - Julie St-Pierre
- University of Ottawa, Faculty of Medicine, Department of Biochemistry Microbiology and Immunology, Ottawa, ON, K1H 8M5, Canada; Ottawa Institute of Systems Biology, Ottawa K1H 8M5, Canada; McGill University, Department of Biochemistry, Montreal, QC H3G 1Y6, Canada
| | - Ruth S Slack
- University of Ottawa, Faculty of Medicine, Department of Cellular and Molecular Medicine, Ottawa, ON K1H 8M5, Canada.
| | - Mary-Ellen Harper
- University of Ottawa, Faculty of Medicine, Department of Biochemistry Microbiology and Immunology, Ottawa, ON, K1H 8M5, Canada; Ottawa Institute of Systems Biology, Ottawa K1H 8M5, Canada.
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21
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Bayır H, Anthonymuthu TS, Tyurina YY, Patel SJ, Amoscato AA, Lamade AM, Yang Q, Vladimirov GK, Philpott CC, Kagan VE. Achieving Life through Death: Redox Biology of Lipid Peroxidation in Ferroptosis. Cell Chem Biol 2020; 27:387-408. [PMID: 32275865 DOI: 10.1016/j.chembiol.2020.03.014] [Citation(s) in RCA: 123] [Impact Index Per Article: 30.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2019] [Revised: 03/02/2020] [Accepted: 03/17/2020] [Indexed: 12/11/2022]
Abstract
Redox balance is essential for normal brain, hence dis-coordinated oxidative reactions leading to neuronal death, including programs of regulated death, are commonly viewed as an inevitable pathogenic penalty for acute neuro-injury and neurodegenerative diseases. Ferroptosis is one of these programs triggered by dyshomeostasis of three metabolic pillars: iron, thiols, and polyunsaturated phospholipids. This review focuses on: (1) lipid peroxidation (LPO) as the major instrument of cell demise, (2) iron as its catalytic mechanism, and (3) thiols as regulators of pro-ferroptotic signals, hydroperoxy lipids. Given the central role of LPO, we discuss the engagement of selective and specific enzymatic pathways versus random free radical chemical reactions in the context of the phospholipid substrates, their biosynthesis, intracellular location, and related oxygenating machinery as participants in ferroptotic cascades. These concepts are discussed in the light of emerging neuro-therapeutic approaches controlling intracellular production of pro-ferroptotic phospholipid signals and their non-cell-autonomous spreading, leading to ferroptosis-associated necroinflammation.
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Affiliation(s)
- Hülya Bayır
- Children's Neuroscience Institute, UPMC Children's Hospital of Pittsburgh, Pittsburgh, PA 15224, USA; Center for Free Radical and Antioxidant Health, Department of Environmental Health, University of Pittsburgh, Pittsburgh, PA 15213, USA; Safar Center for Resuscitation Research, Department of Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA 15224, USA.
| | - Tamil S Anthonymuthu
- Children's Neuroscience Institute, UPMC Children's Hospital of Pittsburgh, Pittsburgh, PA 15224, USA; Center for Free Radical and Antioxidant Health, Department of Environmental Health, University of Pittsburgh, Pittsburgh, PA 15213, USA; Safar Center for Resuscitation Research, Department of Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA 15224, USA
| | - Yulia Y Tyurina
- Center for Free Radical and Antioxidant Health, Department of Environmental Health, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Sarju J Patel
- Genetics and Metabolism Section, Liver Diseases Branch, NIDDK, NIH, Bethesda, MD 20892, USA
| | - Andrew A Amoscato
- Center for Free Radical and Antioxidant Health, Department of Environmental Health, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Andrew M Lamade
- Children's Neuroscience Institute, UPMC Children's Hospital of Pittsburgh, Pittsburgh, PA 15224, USA; Center for Free Radical and Antioxidant Health, Department of Environmental Health, University of Pittsburgh, Pittsburgh, PA 15213, USA; Safar Center for Resuscitation Research, Department of Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA 15224, USA
| | - Qin Yang
- Children's Neuroscience Institute, UPMC Children's Hospital of Pittsburgh, Pittsburgh, PA 15224, USA; Center for Free Radical and Antioxidant Health, Department of Environmental Health, University of Pittsburgh, Pittsburgh, PA 15213, USA; Safar Center for Resuscitation Research, Department of Critical Care Medicine, University of Pittsburgh, Pittsburgh, PA 15224, USA
| | - Georgy K Vladimirov
- Center for Free Radical and Antioxidant Health, Department of Environmental Health, University of Pittsburgh, Pittsburgh, PA 15213, USA; Institute for Regenerative Medicine, Sechenov First Moscow State Medical University, 119991 Moscow, Russia
| | - Caroline C Philpott
- Genetics and Metabolism Section, Liver Diseases Branch, NIDDK, NIH, Bethesda, MD 20892, USA
| | - Valerian E Kagan
- Children's Neuroscience Institute, UPMC Children's Hospital of Pittsburgh, Pittsburgh, PA 15224, USA; Center for Free Radical and Antioxidant Health, Department of Environmental Health, University of Pittsburgh, Pittsburgh, PA 15213, USA; Institute for Regenerative Medicine, Sechenov First Moscow State Medical University, 119991 Moscow, Russia.
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22
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Otoupalova E, Smith S, Cheng G, Thannickal VJ. Oxidative Stress in Pulmonary Fibrosis. Compr Physiol 2020; 10:509-547. [PMID: 32163196 DOI: 10.1002/cphy.c190017] [Citation(s) in RCA: 102] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Oxidative stress has been linked to various disease states as well as physiological aging. The lungs are uniquely exposed to a highly oxidizing environment and have evolved several mechanisms to attenuate oxidative stress. Idiopathic pulmonary fibrosis (IPF) is a progressive age-related disorder that leads to architectural remodeling, impaired gas exchange, respiratory failure, and death. In this article, we discuss cellular sources of oxidant production, and antioxidant defenses, both enzymatic and nonenzymatic. We outline the current understanding of the pathogenesis of IPF and how oxidative stress contributes to fibrosis. Further, we link oxidative stress to the biology of aging that involves DNA damage responses, loss of proteostasis, and mitochondrial dysfunction. We discuss the recent findings on the role of reactive oxygen species (ROS) in specific fibrotic processes such as macrophage polarization and immunosenescence, alveolar epithelial cell apoptosis and senescence, myofibroblast differentiation and senescence, and alterations in the acellular extracellular matrix. Finally, we provide an overview of the current preclinical studies and clinical trials targeting oxidative stress in fibrosis and potential new strategies for future therapeutic interventions. © 2020 American Physiological Society. Compr Physiol 10:509-547, 2020.
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Affiliation(s)
- Eva Otoupalova
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Sam Smith
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Guangjie Cheng
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Victor J Thannickal
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, USA
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Pajares MA, Zimmerman T, Sánchez-Gómez FJ, Ariza A, Torres MJ, Blanca M, Cañada FJ, Montañez MI, Pérez-Sala D. Amoxicillin Inactivation by Thiol-Catalyzed Cyclization Reduces Protein Haptenation and Antibacterial Potency. Front Pharmacol 2020; 11:189. [PMID: 32210804 PMCID: PMC7065267 DOI: 10.3389/fphar.2020.00189] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Accepted: 02/10/2020] [Indexed: 11/25/2022] Open
Abstract
Serum and cellular proteins are targets for the formation of adducts with the β-lactam antibiotic amoxicillin. This process could be important for the development of adverse, and in particular, allergic reactions to this antibiotic. In studies exploring protein haptenation by amoxicillin, we observed that reducing agents influenced the extent of amoxicillin-protein adducts formation. Consequently, we show that several thiol-containing compounds, including dithiothreitol, N-acetyl-L-cysteine, and glutathione, perform a nucleophilic attack on the amoxicillin molecule that is followed by an internal rearrangement leading to amoxicillin diketopiperazine, a known amoxicillin metabolite with residual activity. Increased diketopiperazine conversion is also observed with human serum albumin but not with L-cysteine, which mainly forms the amoxicilloyl amide. The effect of thiols is catalytic and can render complete amoxicillin conversion. Interestingly, this process is dependent on the presence of an amino group in the antibiotic lateral chain, as in amoxicillin and ampicillin. Furthermore, it does not occur for other β-lactam antibiotics, including cefaclor or benzylpenicillin. Biological consequences of thiol-mediated amoxicillin transformation are exemplified by a reduced bacteriostatic action and a lower capacity of thiol-treated amoxicillin to form protein adducts. Finally, modulation of the intracellular redox status through inhibition of glutathione synthesis influenced the extent of amoxicillin adduct formation with cellular proteins. These results open novel perspectives for the understanding of amoxicillin metabolism and actions, including the formation of adducts involved in allergic reactions.
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Affiliation(s)
- María A Pajares
- Department of Structural and Chemical Biology, Centro de Investigaciones Biológicas (CSIC), Madrid, Spain
| | - Tahl Zimmerman
- Department of Structural and Chemical Biology, Centro de Investigaciones Biológicas (CSIC), Madrid, Spain
| | - Francisco J Sánchez-Gómez
- Department of Structural and Chemical Biology, Centro de Investigaciones Biológicas (CSIC), Madrid, Spain
| | - Adriana Ariza
- Allergy Research Group, Instituto de Investigación Biomédica de Málaga-IBIMA, Hospital Civil, Málaga, Spain.,Nanostructures for Diagnosing and Treatment of Allergic Diseases Laboratory, Andalusian Center for Nanomedicine and Biotechnology-BIONAND, Málaga, Spain
| | - María J Torres
- Allergy Research Group, Instituto de Investigación Biomédica de Málaga-IBIMA, Hospital Civil, Málaga, Spain.,Nanostructures for Diagnosing and Treatment of Allergic Diseases Laboratory, Andalusian Center for Nanomedicine and Biotechnology-BIONAND, Málaga, Spain.,Allergy Unit, Hospital Regional Universitario de Málaga, Hospital Civil, Málaga, Spain
| | - Miguel Blanca
- Servicio de Alergología, Hospital Infanta Leonor, Madrid, Spain
| | - F Javier Cañada
- Department of Structural and Chemical Biology, Centro de Investigaciones Biológicas (CSIC), Madrid, Spain
| | - María I Montañez
- Allergy Research Group, Instituto de Investigación Biomédica de Málaga-IBIMA, Hospital Civil, Málaga, Spain.,Nanostructures for Diagnosing and Treatment of Allergic Diseases Laboratory, Andalusian Center for Nanomedicine and Biotechnology-BIONAND, Málaga, Spain
| | - Dolores Pérez-Sala
- Department of Structural and Chemical Biology, Centro de Investigaciones Biológicas (CSIC), Madrid, Spain
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24
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Oxidant/Antioxidant Status of Breast Cancer Patients in Pre- and Post-Operative Periods. ACTA ACUST UNITED AC 2020; 56:medicina56020070. [PMID: 32054000 PMCID: PMC7073838 DOI: 10.3390/medicina56020070] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 02/06/2020] [Accepted: 02/07/2020] [Indexed: 01/28/2023]
Abstract
Background and Objectives: The purpose of this study is to evaluate the level of oxidative stress before and after breast cancer surgery. Materials and Methods: Malondialdehyde (MDA) level was tested using a thiobarbituric acid (TBA) assay based on the release of a color complex due to TBA reaction with MDA. The glutathione S-transferase (GST) activity was evaluated by enzymatic conjugation of reduced glutathione (GSH) with 1-chloro-2,4-dinitrobenzene. The level of total glutathione (reduced GSH and oxidized GSSG) was detected using a recycling system by 5,5-dithiobis(2-nitrobenzoic acid). The levels of the indices were determined in the serum of 52 patients before surgery, two hours and five days after surgery, and in 42 healthy women. Results: In the patients over 50 years old the level of MDA was higher after surgery in comparison with before surgery, and GST activity was lower in comparison with the control. The GSH + GSSG level in both ages groups after surgery was lower than in the control. Significant differences of MDA level were detected in patients with stage III after surgery compared to the control. The level of GSH + GSSG was significantly lower in the patients with I–III stages compared to the control. Conclusion: The most expressed changes demonstrate the significance of MDA as a marker to evaluate oxidative stress in breast cancer patients. The degree of oxidative stress depends on the patient’s age and stage of disease. (1) Malondialdehyde can be used as an oxidative stress marker; (2) A higher stage of the disease and older age correspond to a higher rise of malondialdehyde, suggesting more intensive oxidative stress.
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25
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Jeon J, Kim DH, Kim W, Choi DW, Jung KJ, Jang SI. Dose-response relationship between gamma-glutamyltransferase and the risk of atherosclerotic cardiovascular diseases in Korean adults. Atherosclerosis 2019; 292:152-159. [PMID: 31809984 DOI: 10.1016/j.atherosclerosis.2019.11.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Revised: 10/23/2019] [Accepted: 11/12/2019] [Indexed: 02/07/2023]
Abstract
BACKGROUND AND AIMS The value of gamma-glutamyltransferase (GGT) in the putative mechanisms underlying its association with cardiovascular disease is unclear. This study examined whether serum GGT value has an independent association and dose-response relationship with the risk of atherosclerotic cardiovascular disease (ASCVD). METHODS This observational study included 419,433 subjects from the National Health Insurance Service database. Serum GGT levels were classified into sex-specific quartiles. We used Cox proportional hazard models to examine the effect of serum GGT values on the risk of ASCVD. We quantified associations of the serum GGT quartile groups with risk of ASCVD or each subtype through multivariate sub-distribution hazard models adjusted for covariates at baseline. RESULTS During 4,572,993.8 person-years of follow-up for ASCVD, we documented 40,359 (9.6%) incident cases of ASCVD. The highest serum GGT group had a significant association with ASCVD in contrast to the lowest serum GGT quartile group (hazard ratio [HR] = 1.23, 95% confidence interval [CI] = 1.19-1.27). Serum GGT quartile groups 2, 3, and 4 had a significantly higher risk for incident hemorrhagic stroke than the serum GGT quartile group 1 (Q 2: HR = 0.92, 95% CI = 0.83-1.02; Q 3: HR = 1.03, 95% CI = 0.93-1.15; Q 4: HR = 1.29, 95% CI = 1.16-1.42; p for trend <0.001). For ischemic heart disease (IHD) and myocardial infarction, non-linear trends were shown according to increasing log-transformed GGT values. In the dose-response trends to assess the interaction effect of obese status, differences of trends were shown between serum GGT level and IHD or hemorrhagic stroke. CONCLUSIONS The serum GGT value, which is known as a factor linked to cardiovascular diseases, has a strong independent association and dose-response relationship with hemorrhagic stroke risk in contrast to that with ischemic stroke or IHD.
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Affiliation(s)
- Jooeun Jeon
- Department of Public Health, Graduate School, Yonsei University, Seoul, 03722, Republic of Korea; Department of Epidemiology and Health Promotion, Institute for Health Promotion, Graduate School of Public Health, Yonsei University, Seoul, 03722, Republic of Korea
| | - Dae Hyun Kim
- Department of Senior Healthcare, Graduate School, Eulji University, Daejeon, 34824, Republic of Korea; Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
| | - Woojin Kim
- Department of Preventive Medicine, Yonsei University College of Medicine, Seoul, 03722, Republic of Korea
| | - Dong-Woo Choi
- Department of Public Health, Graduate School, Yonsei University, Seoul, 03722, Republic of Korea; Institute of Health Services Research, Yonsei University, Seoul, 03722, Republic of Korea
| | - Keum Ji Jung
- Department of Epidemiology and Health Promotion, Institute for Health Promotion, Graduate School of Public Health, Yonsei University, Seoul, 03722, Republic of Korea
| | - Sung-In Jang
- Department of Preventive Medicine, Yonsei University College of Medicine, Seoul, 03722, Republic of Korea; Institute of Health Services Research, Yonsei University, Seoul, 03722, Republic of Korea.
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26
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Tang D, Wu J, Jiao H, Wang X, Zhao J, Lin H. The development of antioxidant system in the intestinal tract of broiler chickens. Poult Sci 2019; 98:664-678. [PMID: 30289502 DOI: 10.3382/ps/pey415] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Accepted: 09/25/2018] [Indexed: 01/03/2023] Open
Abstract
The gastrointestinal tract is the site for the uptake of nutrients from the external environment. We hypothesized that the antioxidant system in the intestinal tract has a vital protective role from the oxidative damage induced by oxidants in foods. The aim of this study was to investigate the development of the antioxidant system in the intestine of chickens. The activity and gene expression of the antioxidant enzymes superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GSH-Px) and the content of the non-enzymatic substance glutathione (GSH) were measured in the duodenum, jejunum, and ileum of chickens at 1, 3, 7, 11, 14, 21, 35, and 42 d of age. The results showed that the small intestinal tract had relatively higher SOD activity and GSH concentration and lower CAT and GSH-Px activities, compared with those of other visceral organs. CAT and GSH-Px activities and GSH concentration showed a decreasing trend with age, whereas SOD activity was not significantly influenced by age. The gene expression of SOD1, SOD2, and GSH-Px7 showed a dramatic decrease from 3 d of age. The results indicated that SOD and GSH were highly expressed in the first week of age after hatching. To conclude, the results suggest that SOD and GSH play a vital protective role in the small intestine after hatching, which contributes to rapid development of the intestine.
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Affiliation(s)
- Dazhi Tang
- Shandong Agricultural University, Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, No. 61 Daizong Street, Taian City, Shandong Province, 271018, China
| | - Jianmin Wu
- Shandong Agricultural University, Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, No. 61 Daizong Street, Taian City, Shandong Province, 271018, China
| | - Hongchao Jiao
- Shandong Agricultural University, Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, No. 61 Daizong Street, Taian City, Shandong Province, 271018, China
| | - Xiaojuan Wang
- Shandong Agricultural University, Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, No. 61 Daizong Street, Taian City, Shandong Province, 271018, China
| | - Jingpeng Zhao
- Shandong Agricultural University, Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, No. 61 Daizong Street, Taian City, Shandong Province, 271018, China
| | - Hai Lin
- Shandong Agricultural University, Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, No. 61 Daizong Street, Taian City, Shandong Province, 271018, China
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27
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Immunomodulatory Effects of Glutathione, Garlic Derivatives, and Hydrogen Sulfide. Nutrients 2019; 11:nu11020295. [PMID: 30704060 PMCID: PMC6412746 DOI: 10.3390/nu11020295] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 01/24/2019] [Accepted: 01/28/2019] [Indexed: 12/21/2022] Open
Abstract
Glutathione and aged garlic extract are sulfur-containing products that play important protective and regulatory roles within the immune system and in oxidative processes. Hydrogen sulfide (H2S), an endogenous, gaseous, signaling transmitter, has also been shown to be involved in the regulation of inflammation. Recent studies have shown that sulfur-containing compounds from garlic have beneficial effects in attenuating outcomes associated with cardiovascular disease and inflammation by a mechanism that may be related to the H2S signaling pathway. In this review, we summarize the main functions of glutathione (GSH), garlic derivatives and H2S and their role in the immune response and impact on health and disease.
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28
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Jiang ZY, Lu MC, You QD. Nuclear Factor Erythroid 2-Related Factor 2 (Nrf2) Inhibition: An Emerging Strategy in Cancer Therapy. J Med Chem 2018; 62:3840-3856. [PMID: 30444366 DOI: 10.1021/acs.jmedchem.8b01121] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Nuclear factor erythroid 2-related factor 2 (Nrf2) is a pleiotropic transcription factor, especially for its complex and dual effects in cancer. With the continuous growing research, new regulatory modes and new functions of Nrf2 and tumor-promoting effects of Nrf2 in malignant transformed tumors have become increasingly clear. Accumulating evidence has established that Nrf2 contributes to the whole process of pathogenesis, progression, metastasis, and prognosis of cancer, and Nrf2 could be a promising target in cancer therapy. However, the development of Nrf2 inhibitor is still limited. In this perspective, we will briefly describe the biological function and modulating network of Nrf2, stress its oncogenic role, and point out possible ways to inhibit Nrf2, as well as summarize the reported Nrf2 inhibitors.
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Affiliation(s)
- Zheng-Yu Jiang
- State Key Laboratory of Natural Medicines and Jiang Su Key Laboratory of Drug Design and Optimization , China Pharmaceutical University , Nanjing 210009 , China.,Department of Medicinal Chemistry, School of Pharmacy , China Pharmaceutical University , Nanjing 210009 , China
| | - Meng-Chen Lu
- State Key Laboratory of Natural Medicines and Jiang Su Key Laboratory of Drug Design and Optimization , China Pharmaceutical University , Nanjing 210009 , China.,Department of Medicinal Chemistry, School of Pharmacy , China Pharmaceutical University , Nanjing 210009 , China
| | - Qi-Dong You
- State Key Laboratory of Natural Medicines and Jiang Su Key Laboratory of Drug Design and Optimization , China Pharmaceutical University , Nanjing 210009 , China.,Department of Medicinal Chemistry, School of Pharmacy , China Pharmaceutical University , Nanjing 210009 , China
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29
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Bai Q, Peng B, Wu X, Cao Y, Sun X, Hong M, Na R, Liu B, Li Q, Li Z, Fang W, Zhu N, Zong C, Yu Q. Metabolomic study for essential hypertension patients based on dried blood spot mass spectrometry approach. IUBMB Life 2018; 70:777-785. [PMID: 30092118 DOI: 10.1002/iub.1885] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Accepted: 05/02/2018] [Indexed: 12/30/2022]
Abstract
Hypertension is an increasingly serious public-health challenge worldwide. The traditional blood pressure measurement method could easily and reliably detect blood pressure. However, the delayed symptom onset may influence the screening of essential hypertension (EH). In addition, EH is significantly associated to cardiovascular disease, stroke and kidney disease. Hence, it is urgent to define associated biomarkers with early diagnosis potential for EH. A dried blood spot method integrated with direct infusion mass spectrometry (MS) metabolomic analysis was applied for the detection of metabolites toward 87 EH patients and 91 healthy controls (HC). Multiple algorithms were run on training set (62 EH and 64 HC) for selecting differential metabolites as potential biomarkers. A test set (25 EH and 27 HC) was used to verify and evaluate selected potential biomarkers. A novel blood biomarker model based on Gly, Orn, C10, Orn/Cit, Phe/Tyr, and C5-OH/C8 exhibited potential to differentiate EH patients from HC individuals, with a sensitivity of 0.8400 and a specificity of 0.8889 in test set. The metabolomic analysis of EH is beneficial to the definition of disease-associated biomarkers and the development of new diagnostic approaches. © 2018 IUBMB Life, 70(8):777-785, 2018.
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Affiliation(s)
- Qianru Bai
- Department of Cardiology, Affiliated Zhongshan Hospital of Dalian University, Dalian, Liaoning, China.,Internal medicine, Dalian Medical University, Dalian, Liaoning, China
| | - Baohua Peng
- Clinical Medicine, Xiangya School of Medicine, Central South University, Changsha, Hunan, China
| | - Xue Wu
- Key Laborotary of Liaoning Tumor Clinical Metabolomics (KLLTCM), Jinzhou, Liaoning, China.,RSKT Biopharma Inc, Jinzhou, Liaoning, China
| | - Yunfeng Cao
- Key Laborotary of Liaoning Tumor Clinical Metabolomics (KLLTCM), Jinzhou, Liaoning, China.,RSKT Biopharma Inc, Jinzhou, Liaoning, China.,Laboratory of Biotechnology, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning, China
| | - Xiaoyu Sun
- Key Laborotary of Liaoning Tumor Clinical Metabolomics (KLLTCM), Jinzhou, Liaoning, China.,RSKT Biopharma Inc, Jinzhou, Liaoning, China
| | - Mo Hong
- Key Laborotary of Liaoning Tumor Clinical Metabolomics (KLLTCM), Jinzhou, Liaoning, China.,RSKT Biopharma Inc, Jinzhou, Liaoning, China
| | - Rongmei Na
- Department of Cardiology, Affiliated Zhongshan Hospital of Dalian University, Dalian, Liaoning, China
| | - Baiting Liu
- Department of Cardiology, Affiliated Zhongshan Hospital of Dalian University, Dalian, Liaoning, China
| | - Qianxiao Li
- Department of Cardiology, Zhejiang Province Hospital of Integrated Traditional Chinese and Western Medicine, Hangzhou, China
| | - Zhu Li
- Department of Cardiology, Zhuanghe Central Hospital, Dalian, Liaoning, China
| | - Weiyi Fang
- Department of Cardiology, Shanghai Chest Hospital, Shanghai, China
| | - Ning Zhu
- Department of Cardiology, The Second Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, China
| | - Chengguo Zong
- Department of Laboratory Medicine, Affiliated Zhongshan Hospital of Dalian University, Dalian, Liaoning, China
| | - Qin Yu
- Department of Cardiology, Affiliated Zhongshan Hospital of Dalian University, Dalian, Liaoning, China
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30
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Borude P, Bhushan B, Gunewardena S, Akakpo J, Jaeschke H, Apte U. Pleiotropic Role of p53 in Injury and Liver Regeneration after Acetaminophen Overdose. THE AMERICAN JOURNAL OF PATHOLOGY 2018; 188:1406-1418. [PMID: 29654721 DOI: 10.1016/j.ajpath.2018.03.006] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Revised: 03/08/2018] [Accepted: 03/23/2018] [Indexed: 12/13/2022]
Abstract
p53 is the major cellular gatekeeper involved in proliferation, cell death, migration, and homeostasis. The role of p53 in pathogenesis of drug-induced liver injury is unknown. We investigated the role of p53 in liver injury and regeneration after acetaminophen (APAP) overdose, the most common cause of acute liver failure in the Western world. Eight-week-old male wild-type (WT) and p53 knockout (p53KO) mice were treated with 300 mg/kg APAP, and the dynamics of liver injury and regeneration were studied over a time course of 0 to 96 hours. Deletion of p53 resulted in a threefold higher liver injury than in WT mice. Interestingly, despite higher liver injury, p53KO mice recovered similarly as the WT mice because of faster liver regeneration. Deletion of p53 did not affect APAP bioactivation and initiation of injury. Microarray analysis revealed that p53KO mice had disrupted metabolic homeostasis and induced inflammatory and proliferative signaling. p53KO mice showed prolonged steatosis correlating with prolonged liver injury. Initiation of liver regeneration in p53KO mice was delayed, but once initiated, cell cycle was significantly faster than WT mice because of sustained AKT, extracellular signal-regulated kinase, and mammalian target of rapamycin signaling. These studies show that p53 plays a pleotropic role after APAP overdose, where it prevents progression of liver injury by maintaining metabolic homeostasis and also regulates initiation of liver regeneration through proliferative signaling.
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Affiliation(s)
- Prachi Borude
- Department of Pharmacology, Toxicology and Therapeutics, University of Kansas Medical Center, Kansas City, Kansas
| | - Bharat Bhushan
- Department of Pharmacology, Toxicology and Therapeutics, University of Kansas Medical Center, Kansas City, Kansas
| | - Sumedha Gunewardena
- Department of Biostatistics, University of Kansas Medical Center, Kansas City, Kansas
| | - Jephte Akakpo
- Department of Pharmacology, Toxicology and Therapeutics, University of Kansas Medical Center, Kansas City, Kansas
| | - Hartmut Jaeschke
- Department of Pharmacology, Toxicology and Therapeutics, University of Kansas Medical Center, Kansas City, Kansas
| | - Udayan Apte
- Department of Pharmacology, Toxicology and Therapeutics, University of Kansas Medical Center, Kansas City, Kansas.
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31
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Ivanenko GF, Bobkova NV. The State of Glutathione in Animal Blood Plasma in the Development of Experimental Pathology that Simulates Neurodegeneration of the Alzheimer’s Disease Type. Biophysics (Nagoya-shi) 2018. [DOI: 10.1134/s0006350918020124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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32
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Mono-allyloxylated Cucurbit[7]uril Acts as an Unconventional Amphiphile To Form Light-Responsive Vesicles. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201713059] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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33
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Park KM, Baek K, Ko YH, Shrinidhi A, Murray J, Jang WH, Kim KH, Lee JS, Yoo J, Kim S, Kim K. Mono-allyloxylated Cucurbit[7]uril Acts as an Unconventional Amphiphile To Form Light-Responsive Vesicles. Angew Chem Int Ed Engl 2018; 57:3132-3136. [DOI: 10.1002/anie.201713059] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Revised: 01/25/2018] [Indexed: 12/20/2022]
Affiliation(s)
- Kyeng Min Park
- Center for Self-assembly and Complexity (CSC); Institute for Basic Science (IBS); Pohang 37363 Republic of Korea
- Department of Nanomaterials Science and Engineering; University of Science and Technology (UST); Daejeon 34113 Republic of Korea
| | - Kangkyun Baek
- Center for Self-assembly and Complexity (CSC); Institute for Basic Science (IBS); Pohang 37363 Republic of Korea
| | - Young Ho Ko
- Center for Self-assembly and Complexity (CSC); Institute for Basic Science (IBS); Pohang 37363 Republic of Korea
| | - Annadka Shrinidhi
- Center for Self-assembly and Complexity (CSC); Institute for Basic Science (IBS); Pohang 37363 Republic of Korea
| | - James Murray
- Center for Self-assembly and Complexity (CSC); Institute for Basic Science (IBS); Pohang 37363 Republic of Korea
| | - Won Hyuk Jang
- Division of Integrative Biosciences and Biotechnology; POSTECH; Republic of Korea
| | - Ki Hean Kim
- Department of Mechanical Engineering; POSTECH; Republic of Korea
- Division of Integrative Biosciences and Biotechnology; POSTECH; Republic of Korea
| | - Jun-Seok Lee
- Molecular Recognition Research Center & Department of Biological Chemistry; KIST-School Korea Institute of Science & Technology; Seoul 02792 Republic of Korea
| | - Jejoong Yoo
- Center for Self-assembly and Complexity (CSC); Institute for Basic Science (IBS); Pohang 37363 Republic of Korea
| | - Sungwan Kim
- Department of Chemistry; POSTECH; Pohang 37363 Republic of Korea
| | - Kimoon Kim
- Center for Self-assembly and Complexity (CSC); Institute for Basic Science (IBS); Pohang 37363 Republic of Korea
- Department of Chemistry; POSTECH; Pohang 37363 Republic of Korea
- Division of Integrative Biosciences and Biotechnology; POSTECH; Republic of Korea
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34
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Glycine Increases Insulin Sensitivity and Glutathione Biosynthesis and Protects against Oxidative Stress in a Model of Sucrose-Induced Insulin Resistance. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2018; 2018:2101562. [PMID: 29675131 PMCID: PMC5841105 DOI: 10.1155/2018/2101562] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 11/05/2017] [Accepted: 11/28/2017] [Indexed: 12/24/2022]
Abstract
Oxidative stress and redox status play a central role in the link between insulin resistance (IR) and lipotoxicity in metabolic syndrome. This mechanistic link may involve alterations in the glutathione redox state. We examined the effect of glycine supplementation to diet on glutathione biosynthesis, oxidative stress, IR, and insulin cell signaling in liver from sucrose-fed (SF) rats characterized by IR and oxidative stress. Our hypothesis is that the correction of glutathione levels by glycine treatment leads to reduced oxidative stress, a mechanism associated with improved insulin signaling and IR. Glycine treatment decreases the levels of oxidative stress markers in liver from SF rats and increases the concentrations of glutathione (GSH) and γ-glutamylcysteine and the amount of γ-glutamylcysteine synthetase (γ-GCS), a key enzyme of GSH biosynthesis in liver from SF rats. In liver from SF rats, glycine also decreases the insulin-induced phosphorylation of insulin receptor substrate-1 (ISR-1) in serine residue and increases the phosphorylation of insulin receptor β-subunit (IR-β) in tyrosine residue. Thus, supplementing diets with glycine to correct GSH deficiency and to reduce oxidative stress provides significant metabolic benefits to SF rats by improving insulin sensitivity.
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35
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Liu X, Song B, Ma H, Tang Z, Yuan J. Development of a mitochondria targetable ratiometric time-gated luminescence probe for biothiols based on lanthanide complexes. J Mater Chem B 2018; 6:1844-1851. [DOI: 10.1039/c8tb00030a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A mitochondria targetable ratiometric luminescence probe based on a mixture of Eu3+ and Tb3+ complexes has been developed for the specific recognition and ratiometric time-gated luminescence detection of biothiols in aqueous and living samples.
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Affiliation(s)
- Xiangli Liu
- State Key Laboratory of Fine Chemicals
- School of Chemistry
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Bo Song
- State Key Laboratory of Fine Chemicals
- School of Chemistry
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Hua Ma
- State Key Laboratory of Fine Chemicals
- School of Chemistry
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Zhixin Tang
- State Key Laboratory of Fine Chemicals
- School of Chemistry
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Jingli Yuan
- State Key Laboratory of Fine Chemicals
- School of Chemistry
- Dalian University of Technology
- Dalian 116024
- P. R. China
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36
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Protein Glutathionylation in the Pathogenesis of Neurodegenerative Diseases. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:2818565. [PMID: 29456785 PMCID: PMC5804111 DOI: 10.1155/2017/2818565] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Revised: 11/27/2017] [Accepted: 12/05/2017] [Indexed: 12/13/2022]
Abstract
Protein glutathionylation is a redox-mediated posttranslational modification that regulates the function of target proteins by conjugating glutathione with a cysteine thiol group on the target proteins. Protein glutathionylation has several biological functions such as regulation of metabolic pathways, calcium homeostasis, signal transduction, remodeling of cytoskeleton, inflammation, and protein folding. However, the exact role and mechanism of glutathionylation during irreversible oxidative stress has not been completely defined. Irreversible oxidative damage is implicated in a number of neurological disorders. Here, we discuss and highlight the most recent findings and several evidences for the association of glutathionylation with neurodegenerative diseases and the role of glutathionylation of specific proteins in the pathogenesis of neurodegenerative diseases. Understanding the important role of glutathionylation in the pathogenesis of neurodegenerative diseases may provide insights into novel therapeutic interventions.
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Veltman K, Ahmad Y, Harris C, Jolliet O. Characterizing thiol redox dynamics in the organogenesis stage rat embryo. Free Radic Biol Med 2017; 113:97-108. [PMID: 28916472 DOI: 10.1016/j.freeradbiomed.2017.09.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Revised: 08/30/2017] [Accepted: 09/09/2017] [Indexed: 01/19/2023]
Abstract
Precise control of the glutathione (GSH): glutathione disulfide (GSSG) balance is vital for the developing embryo, but it is not yet well understood how GSH levels and the GSH redox state are regulated, maintained, and modulated over the course of mammalian embryonic development. In this study, we characterize and connect thiol redox dynamics, protein synthesis, volumetric growth and net cysteine fluxes over the course of early organogenesis (gestational day (GD) 10-GD11.13) in the rat embryo. Our results show that despite a significant exponential growth of conceptal volumes and protein mass, the GSH: GSSG redox balance is remarkably stable during early organogenesis, with distinct redox potentials for the visceral yolk sac (VYS) (- 218mV) and the embryo proper (EMB) (- 222mV). The yolk sac was found to play a key role in maintaining GSH levels and the GSH: GSSG redox balance in the developing embryo. Based on an overall cysteine (Cys) mass-balance, we show that until GD10.6, yolk sac supply of Cys, the rate-limiting precursor for GSH synthesis, is sufficient to sustain embryonic demands for its GSH synthesis and protein synthesis needs. After GD10.6, the EMB maintains the amino acid intake flux, resulting in a significant depletion of most thiols in the amniotic fluid and the yolk sac fluid. Cysteine, was found to be predominantly used for de novo protein synthesis in the developing embryo (approximately 90% of total Cys). Protein synthesis (rates) should thus be included in any quantitative assessment of GSH redox dynamics in the developing embryo. Our time-course dataset of thiol dynamics, developed exponential relationships for protein synthesis and volumetric growth, and yolk sac surface area-mediated protein influx, provide important quantitative insights in GSH redox dynamics during embryonic development and are a prerequisite to further develop quantitative 'systems biology' models for GSH metabolism in the developing embryo.
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Affiliation(s)
- K Veltman
- University of Michigan, School of Public Health, Department of Environmental Health Sciences, Ann Arbor, MI, United States.
| | - Y Ahmad
- University of Michigan, School of Public Health, Department of Environmental Health Sciences, Ann Arbor, MI, United States
| | - C Harris
- University of Michigan, School of Public Health, Department of Environmental Health Sciences, Ann Arbor, MI, United States
| | - O Jolliet
- University of Michigan, School of Public Health, Department of Environmental Health Sciences, Ann Arbor, MI, United States
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Javed M, Usmani N. An Overview of the Adverse Effects of Heavy Metal Contamination on Fish Health. ACTA ACUST UNITED AC 2017. [DOI: 10.1007/s40011-017-0875-7] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Enns GM, Cowan TM. Glutathione as a Redox Biomarker in Mitochondrial Disease-Implications for Therapy. J Clin Med 2017; 6:jcm6050050. [PMID: 28467362 PMCID: PMC5447941 DOI: 10.3390/jcm6050050] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Revised: 04/24/2017] [Accepted: 04/27/2017] [Indexed: 01/01/2023] Open
Abstract
Technical advances in the ability to measure mitochondrial dysfunction are providing new insights into mitochondrial disease pathogenesis, along with new tools to objectively evaluate the clinical status of mitochondrial disease patients. Glutathione (l-ϒ-glutamyl-l-cysteinylglycine) is the most abundant intracellular thiol, and the intracellular redox state, as reflected by levels of oxidized (GSSG) and reduced (GSH) glutathione, as well as the GSH/GSSG ratio, is considered to be an important indication of cellular health. The ability to quantify mitochondrial dysfunction in an affected patient will not only help with routine care, but also improve rational clinical trial design aimed at developing new therapies. Indeed, because multiple disorders have been associated with either primary or secondary deficiency of the mitochondrial electron transport chain and redox imbalance, developing mitochondrial therapies that have the potential to improve the intracellular glutathione status has been a focus of several clinical trials over the past few years. This review will also discuss potential therapies to increase intracellular glutathione with a focus on EPI-743 (α-tocotrienol quinone), a compound that appears to have the ability to modulate the activity of oxidoreductases, in particular NAD(P)H:quinone oxidoreductase 1.
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Affiliation(s)
- Gregory M Enns
- Departments of Pediatrics and Pathology, Stanford University, 300 Pasteur Drive, H-315, Stanford, CA 94005-5208, USA.
| | - Tina M Cowan
- Departments of Pediatrics and Pathology, Stanford University, 300 Pasteur Drive, H-315, Stanford, CA 94005-5208, USA.
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Nagy T, Hardi P, Takács I, Tóth M, Petrovics L, Jancsó G, Sínay L, Fazekas G, Pintér Ö, Arató E. Pentoxifylline attenuates the local and systemic inflammatory response after infrarenal abdominal aortic ischemia-reperfusion. Clin Hemorheol Microcirc 2017; 65:229-240. [DOI: 10.3233/ch-16169] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Tibor Nagy
- Department of Surgical Research and Techniques, Medical School, University of Pécs, Hungary
| | - Péter Hardi
- Department of Surgical Research and Techniques, Medical School, University of Pécs, Hungary
| | - Ildikó Takács
- Department of Surgical Research and Techniques, Medical School, University of Pécs, Hungary
| | - Mónika Tóth
- Department of Surgical Research and Techniques, Medical School, University of Pécs, Hungary
| | - Laura Petrovics
- Department of Surgical Research and Techniques, Medical School, University of Pécs, Hungary
| | - Gábor Jancsó
- Department of Surgical Research and Techniques, Medical School, University of Pécs, Hungary
| | - László Sínay
- Department of Vascular Surgery, Medical School, University of Pécs, Hungary
| | - Gábor Fazekas
- Department of Vascular Surgery, Medical School, University of Pécs, Hungary
| | - Örs Pintér
- Heart Institute, Medical School, University of Pécs, Hungary
| | - Endre Arató
- Department of Vascular Surgery, Medical School, University of Pécs, Hungary
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Colorimetric detection of glutathione in cells based on peroxidase-like activity of gold nanoclusters: A promising powerful tool for identifying cancer cells. Anal Chim Acta 2017; 967:64-69. [PMID: 28390487 DOI: 10.1016/j.aca.2017.02.025] [Citation(s) in RCA: 83] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Revised: 01/19/2017] [Accepted: 02/24/2017] [Indexed: 01/30/2023]
Abstract
Glutathione (GSH), the most abundant biothiol in cells, not only plays a pivotal role in protective and detoxifying functions of the cell, but also serves as a very important mediator in many cellular functions. Especially, the difference of GSH level between cancer cells and normal cells is regarded as one of most important physiological parameters for cancer diagnosis. It is thereby extremely necessary to develop a simple, sensitive, and reliable analytical method for detection of GSH in cells. On the basis of the inhibition effect of GSH on the peroxidase-like activity of GSH stabilized gold nanoclusters, here a novel and facile strategy for colorimetric detection of cellular GSH level was well established. In this sensing system, GSH can effectively inhibit the oxidation of peroxidase substrate 3,3',5,5'-tetramethylbenzidine (TMB) to produce a blue colored product. Under the optimized conditions, the absorbance at 652 nm against GSH concentration shows a linear relationship within a range from 2 to 25 μM with detection limit of 420 nM. This excellent property allows our approach to be used to accurately evaluate the cellular GSH levels, and it is revealed that the overall GSH level in cancer cells was much higher than that in normal cells. The presented assay will enable a powerful tool for identifying cancer cells in a simple manner for biomedical diagnosis associated with GSH.
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Ost M, Keipert S, Klaus S. Targeted mitochondrial uncoupling beyond UCP1 – The fine line between death and metabolic health. Biochimie 2017; 134:77-85. [DOI: 10.1016/j.biochi.2016.11.013] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2016] [Revised: 11/07/2016] [Accepted: 11/13/2016] [Indexed: 12/25/2022]
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Schwimmer JB, Lavine JE, Wilson LA, Neuschwander-Tetri BA, Xanthakos SA, Kohli R, Barlow SE, Vos MB, Karpen SJ, Molleston JP, Whitington PF, Rosenthal P, Jain AK, Murray KF, Brunt EM, Kleiner DE, Van Natta ML, Clark JM, Tonascia J, Doo E. In Children With Nonalcoholic Fatty Liver Disease, Cysteamine Bitartrate Delayed Release Improves Liver Enzymes but Does Not Reduce Disease Activity Scores. Gastroenterology 2016; 151:1141-1154.e9. [PMID: 27569726 PMCID: PMC5124386 DOI: 10.1053/j.gastro.2016.08.027] [Citation(s) in RCA: 85] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Revised: 08/17/2016] [Accepted: 08/18/2016] [Indexed: 01/14/2023]
Abstract
BACKGROUND & AIMS No treatment for nonalcoholic fatty liver disease (NAFLD) has been approved by regulatory agencies. We performed a randomized controlled trial to determine whether 52 weeks of cysteamine bitartrate delayed release (CBDR) reduces the severity of liver disease in children with NAFLD. METHODS We performed a double-masked trial of 169 children with NAFLD activity scores of 4 or higher at 10 centers. From June 2012 to January 2014, the patients were assigned randomly to receive CBDR or placebo twice daily (300 mg for patients weighing ≤65 kg, 375 mg for patients weighing >65 to 80 kg, and 450 mg for patients weighing >80 kg) for 52 weeks. The primary outcome from the intention-to-treat analysis was improvement in liver histology over 52 weeks, defined as a decrease in the NAFLD activity score of 2 points or more without worsening fibrosis; patients without biopsy specimens from week 52 (17 in the CBDR group and 6 in the placebo group) were considered nonresponders. We calculated the relative risks (RR) of improvement using a stratified Cochran-Mantel-Haenszel analysis. RESULTS There was no significant difference between groups in the primary outcome (28% of children in the CBDR group vs 22% in the placebo group; RR, 1.3; 95% confidence interval [CI], 0.8-2.1; P = .34). However, children receiving CBDR had significant changes in prespecified secondary outcomes: reduced mean levels of alanine aminotransferase (reduction, 53 ± 88 U/L vs 8 ± 77 U/L in the placebo group; P = .02) and aspartate aminotransferase (reduction, 31 ± 52 vs 4 ± 36 U/L in the placebo group; P = .008), and a larger proportion had reduced lobular inflammation (36% in the CBDR group vs 21% in the placebo group; RR, 1.8; 95% CI, 1.1-2.9; P = .03). In a post hoc analysis of children weighing 65 kg or less, those taking CBDR had a 4-fold better chance of histologic improvement (observed in 50% of children in the CBDR group vs 13% in the placebo group; RR, 4.0; 95% CI, 1.3-12.3; P = .005). CONCLUSIONS In a randomized trial, we found that 1 year of CBDR did not reduce overall histologic markers of NAFLD compared with placebo in children. Children receiving CBDR, however, had significant reductions in serum aminotransferase levels and lobular inflammation. ClinicalTrials.gov no: NCT01529268.
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Affiliation(s)
- Jeffrey B Schwimmer
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, University of California San Diego School of Medicine, La Jolla, California; Department of Gastroenterology, Rady Children's Hospital, San Diego, California.
| | - Joel E Lavine
- Division of Gastroenterology, Hepatology and Nutrition, Department of Pediatrics, Columbia University, and Morgan Stanley Children's Hospital of New York Presbyterian, New York, New York
| | - Laura A Wilson
- Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | | | - Stavra A Xanthakos
- Steatohepatitis Center, Division of Pediatric Gastroenterology, Hepatology and Nutrition, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Rohit Kohli
- Steatohepatitis Center, Division of Pediatric Gastroenterology, Hepatology and Nutrition, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Sarah E Barlow
- Division of Gastroenterology, Hepatology and Nutrition, Department of Pediatrics, Baylor College of Medicine and Texas Children's Hospital, Houston, Texas
| | - Miriam B Vos
- Division of Gastroenterology, Hepatology and Nutrition, Department of Pediatrics, Emory University School of Medicine, Children's Healthcare of Atlanta, Atlanta, Georgia
| | - Saul J Karpen
- Division of Pediatric Gastroenterology, Hepatology and Nutrition, Department of Pediatrics, Emory University School of Medicine, Children's Healthcare of Atlanta, Atlanta, Georgia
| | - Jean P Molleston
- Division of Pediatric Gastroenterology, Hepatology and Nutrition, Department of Pediatrics, Indiana University School of Medicine/Riley Hospital for Children, Indianapolis, Indiana
| | - Peter F Whitington
- Department of Pediatrics, Feinberg Medical School of Northwestern University and the Ann and Robert H Lurie Children's Hospital of Chicago, Chicago, Illinois
| | - Philip Rosenthal
- Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, University of California, San Francisco Benioff Children's Hospital, San Francisco, California
| | - Ajay K Jain
- Department of Pediatrics, St. Louis University, St. Louis, Missouri
| | - Karen F Murray
- Division of Gastroenterology and Hepatology, Department of Pediatrics, University of Washington School of Medicine and Seattle Children's, Seattle, Washington
| | - Elizabeth M Brunt
- Department of Pathology, Washington University in St. Louis, St. Louis, Missouri
| | | | - Mark L Van Natta
- Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Jeanne M Clark
- Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - James Tonascia
- Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Edward Doo
- Liver Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, Maryland
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Hardi P, Nagy T, Fazekas G, Arató E, Menyhei G, Sétáló G, Vecsernyés M, Pintér Ö, Takács I, Bohonyi N, Jancsó G. Sodium Pentosan Polysulfate Reduced Renal Ischemia-Reperfusion-Induced Oxidative Stress and Inflammatory Responses in an Experimental Animal Model. J Vasc Res 2016; 53:230-242. [PMID: 27889777 DOI: 10.1159/000452246] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Accepted: 10/01/2016] [Indexed: 11/19/2022] Open
Abstract
Acute kidney injury (AKI) remains an independent risk factor for mortality and morbidity after vascular surgery (affecting the renal arteries) or aortic surgery (requiring suprarenal aortic clamping). These types of vascular surgery produce renal ischemia/reperfusion (I/R) injury, a common cause of AKI. The present studies aimed at monitoring the course of renal I/R injury at the cellular level and investigating the efficacy of long-term preoperative and single-shot intraoperative administration of sodium pentosan polysulfate (PPS) to protect renal tissue from acute I/R injury both in native and diabetic kidneys in rats. Western blot analyses of the proapoptotic (bax) and antiapoptotic (bcl-2) signaling pathways, as well as the extent of DNA damage (phospho-p53), were performed. Oxidative stress followed upon the termination of malondialdehyde, reduced glutathione, thiol group, and superoxide dismutase plasma levels. Inflammatory changes were measured by the determination of serum tumor necrosis factor-α and interleukin-1 levels. Morphological changes were detected by histological examinations. Our results showed that the long-term administration of PPS has an advantage in reducing I/R kidney injury in diabetic rats, while high-dose, single-shot parenteral administration of PPS prior to revascularization might be useful in nondiabetic rats.
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Affiliation(s)
- Péter Hardi
- Department of Surgical Research and Techniques, Medical School, University of Pécs, Pécs, Hungary
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Quercetin affects glutathione levels and redox ratio in human aortic endothelial cells not through oxidation but formation and cellular export of quercetin-glutathione conjugates and upregulation of glutamate-cysteine ligase. Redox Biol 2016; 9:220-228. [PMID: 27572418 PMCID: PMC5011167 DOI: 10.1016/j.redox.2016.08.012] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Revised: 07/28/2016] [Accepted: 08/18/2016] [Indexed: 12/21/2022] Open
Abstract
Endothelial dysfunction due to vascular inflammation and oxidative stress critically contributes to the etiology of atherosclerosis. The intracellular redox environment plays a key role in regulating endothelial cell function and is intimately linked to cellular thiol status, including and foremost glutathione (GSH). In the present study we investigated whether and how the dietary flavonoid, quercetin, affects GSH status of human aortic endothelial cells (HAEC) and their response to oxidative stress. We found that treating cells with buthionine sulfoximine to deplete cellular GSH levels significantly reduced the capacity of quercetin to inhibit lipopolysaccharide (LPS)-induced oxidant production. Furthermore, incubation of HAEC with quercetin caused a transient decrease and then full recovery of cellular GSH concentrations. The initial decline in GSH was not accompanied by a corresponding increase in glutathione disulfide (GSSG). To the contrary, GSSG levels, which were less than 0.5% of GSH levels at baseline (0.26±0.01 vs. 64.7±1.9 nmol/mg protein, respectively), decreased by about 25% during incubation with quercetin. As a result, the GSH: GSSG ratio increased by about 70%, from 253±7 to 372±23. These quercetin-induced changes in GSH and GSSG levels were not affected by treating HAEC with 500 µM ascorbic acid phosphate for 24 h to increase intracellular ascorbate levels. Incubation of HAEC with quercetin also led to the appearance of extracellular quercetin-glutathione conjugates, which was paralleled by upregulation of the multidrug resistance protein 1 (MRP1). Furthermore, quercetin slightly but significantly increased mRNA and protein levels of glutamate-cysteine ligase (GCL) catalytic and modifier subunits. Taken together, our results suggest that quercetin causes loss of GSH in HAEC, not because of oxidation but due to formation and cellular export of quercetin-glutathione conjugates. Induction by quercetin of GCL subsequently restores GSH levels, thereby suppressing LPS-induced oxidant production. Glutathione mediates the antioxidant effects of quercetin in human aortic endothelial cells. Quercetin affects cellular levels of GSH and GSSG, resulting in an increased redox ratio. Quercetin forms conjugates with GSH, which are rapidly excreted from the cells. Quercetin induces glutamate-cysteine ligase and multidrug resistance protein 1 via Nrf2 activation.
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Ferreira DJS, da Silva Pedroza AA, Braz GRF, da Silva-Filho RC, Lima TA, Fernandes MP, Doi SQ, Lagranha CJ. Mitochondrial bioenergetics and oxidative status disruption in brainstem of weaned rats: Immediate response to maternal protein restriction. Brain Res 2016; 1642:553-561. [PMID: 27109594 DOI: 10.1016/j.brainres.2016.04.049] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Revised: 03/31/2016] [Accepted: 04/21/2016] [Indexed: 02/07/2023]
Abstract
Mitochondrial bioenergetics dysfunction has been postulated as an important mechanism associated to a number of cardiovascular diseases in adulthood. One of the hypotheses is that this is caused by the metabolic challenge generated by the mismatch between prenatal predicted and postnatal reality. Perinatal low-protein diet produces several effects that are manifested in the adult animal, including altered sympathetic tone, increased arterial blood pressure and oxidative stress in the brainstem. The majority of the studies related to nutritional programming postulates that the increased risk levels for non-communicable diseases are associated with the incompatibility between prenatal and postnatal environment. However, little is known about the immediate effects of maternal protein restriction on the offspring's brainstem. The present study aimed to test the hypothesis that a maternal low-protein diet causes tissue damage immediately after exposure to the nutritional insult that can be assessed in the brainstem of weaned offspring. In this regard, a series of assays was conducted to measure the mitochondrial bioenergetics and oxidative stress biomarkers in the brainstem, which is the brain structure responsible for the autonomic cardiovascular control. Pregnant Wistar rats were fed ad libitum with normoprotein (NP; 17% casein) or low-protein (LP; 8% casein) diet throughout pregnancy and lactation periods. At weaning, the male offsprings were euthanized and the brainstem was quickly removed to assess the mitochondria function, reactive oxygen species (ROS) production, mitochondrial membrane electric potential (ΔΨm), oxidative biomarkers, antioxidant defense and redox status. Our data demonstrated that perinatal LP diet induces an immediate mitochondrial dysfunction. Furthermore, the protein restriction induced a marked increase in ROS production, with a decrease in antioxidant defense and redox status. Altogether, our findings suggest that LP-fed animals may be at a higher risk for oxidative metabolism impairment throughout life than NP-fed rats, due to the immediate disruption of the mitochondrial bioenergetics and oxidative status caused by the LP diet.
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Affiliation(s)
- Diorginis José Soares Ferreira
- Neuropsychiatry and Behavioral Science Graduate Program, Federal University of Pernambuco, 50670-901, Brazil; Laboratory of Biochemistry and Exercise Biochemistry, Department of Physical Education and Sports Science, Federal University of Pernambuco-CAV, Vitória de Santo Antão 55608-680, Brazil
| | - Anderson Apolônio da Silva Pedroza
- Laboratory of Biochemistry and Exercise Biochemistry, Department of Physical Education and Sports Science, Federal University of Pernambuco-CAV, Vitória de Santo Antão 55608-680, Brazil
| | - Glauber Ruda Feitoza Braz
- Laboratory of Biochemistry and Exercise Biochemistry, Department of Physical Education and Sports Science, Federal University of Pernambuco-CAV, Vitória de Santo Antão 55608-680, Brazil
| | - Reginaldo Correia da Silva-Filho
- Laboratory of Biochemistry and Exercise Biochemistry, Department of Physical Education and Sports Science, Federal University of Pernambuco-CAV, Vitória de Santo Antão 55608-680, Brazil
| | - Talitta Arruda Lima
- Laboratory of Biochemistry and Exercise Biochemistry, Department of Physical Education and Sports Science, Federal University of Pernambuco-CAV, Vitória de Santo Antão 55608-680, Brazil
| | - Mariana Pinheiro Fernandes
- Laboratory of Biochemistry and Exercise Biochemistry, Department of Physical Education and Sports Science, Federal University of Pernambuco-CAV, Vitória de Santo Antão 55608-680, Brazil
| | - Sonia Q Doi
- Department of Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Claudia Jacques Lagranha
- Neuropsychiatry and Behavioral Science Graduate Program, Federal University of Pernambuco, 50670-901, Brazil; Laboratory of Biochemistry and Exercise Biochemistry, Department of Physical Education and Sports Science, Federal University of Pernambuco-CAV, Vitória de Santo Antão 55608-680, Brazil.
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Gao B, Cui L, Pan Y, Zhang G, Zhou Y, Zhang C, Shuang S, Dong C. A highly selective ratiometric fluorescent probe for biothiol and imaging in live cells. RSC Adv 2016. [DOI: 10.1039/c6ra04564b] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
A new N-butyl-4-amino-1,8-naphthalimide-based colorimetric and ratiometric fluorescent probe for the detection of biothiols (cysteine, homocysteine, and glutathione) was designed and synthesized.
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Affiliation(s)
- Baozhen Gao
- Department of Chemistry and Chemical Engineering
- Shanxi University
- Taiyuan 030006
- China
| | - Lixia Cui
- Department of Chemistry and Chemical Engineering
- Shanxi University
- Taiyuan 030006
- China
| | - Yong Pan
- State Key Laboratory of NBC Protection for Civilian
- Research Institute of Chemical Defense
- Beijing
- China
| | - Guomei Zhang
- Department of Chemistry and Chemical Engineering
- Shanxi University
- Taiyuan 030006
- China
| | - Ying Zhou
- Department of Chemistry and Chemical Engineering
- Shanxi University
- Taiyuan 030006
- China
| | - Caihong Zhang
- Department of Chemistry and Chemical Engineering
- Shanxi University
- Taiyuan 030006
- China
| | - Shaomin Shuang
- Department of Chemistry and Chemical Engineering
- Shanxi University
- Taiyuan 030006
- China
| | - Chuan Dong
- Department of Chemistry and Chemical Engineering
- Shanxi University
- Taiyuan 030006
- China
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48
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Yuan Y, Xu S, Zhang CJ, Zhang R, Liu B. Dual-targeted activatable photosensitizers with aggregation-induced emission (AIE) characteristics for image-guided photodynamic cancer cell ablation. J Mater Chem B 2016; 4:169-176. [DOI: 10.1039/c5tb02270c] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The currently available photosensitizers (PSs) for photodynamic therapy (PDT) can easily lead to undesirable normal cell death due to their intrinsic photo-toxicity and lack of selectivity for cancer cells.
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Affiliation(s)
- Youyong Yuan
- Department of Chemical and Biomolecular Engineering
- National University of Singapore
- Singapore
| | - Shidang Xu
- Department of Chemical and Biomolecular Engineering
- National University of Singapore
- Singapore
| | - Chong-Jing Zhang
- Department of Chemical and Biomolecular Engineering
- National University of Singapore
- Singapore
| | - Ruoyu Zhang
- Department of Chemical and Biomolecular Engineering
- National University of Singapore
- Singapore
| | - Bin Liu
- Department of Chemical and Biomolecular Engineering
- National University of Singapore
- Singapore
- Institute of Materials Research and Engineering
- Agency for Science
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49
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Murray TVA, Dong X, Sawyer GJ, Caldwell A, Halket J, Sherwood R, Quaglia A, Dew T, Anilkumar N, Burr S, Mistry RK, Martin D, Schröder K, Brandes RP, Hughes RD, Shah AM, Brewer AC. NADPH oxidase 4 regulates homocysteine metabolism and protects against acetaminophen-induced liver damage in mice. Free Radic Biol Med 2015; 89:918-30. [PMID: 26472193 PMCID: PMC4698376 DOI: 10.1016/j.freeradbiomed.2015.09.015] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Revised: 09/02/2015] [Accepted: 09/04/2015] [Indexed: 01/08/2023]
Abstract
Glutathione is the major intracellular redox buffer in the liver and is critical for hepatic detoxification of xenobiotics and other environmental toxins. Hepatic glutathione is also a major systemic store for other organs and thus impacts on pathologies such as Alzheimer's disease, Sickle Cell Anaemia and chronic diseases associated with aging. Glutathione levels are determined in part by the availability of cysteine, generated from homocysteine through the transsulfuration pathway. The partitioning of homocysteine between remethylation and transsulfuration pathways is known to be subject to redox-dependent regulation, but the underlying mechanisms are not known. An association between plasma Hcy and a single nucleotide polymorphism within the NADPH oxidase 4 locus led us to investigate the involvement of this reactive oxygen species- generating enzyme in homocysteine metabolism. Here we demonstrate that NADPH oxidase 4 ablation in mice results in increased flux of homocysteine through the betaine-dependent remethylation pathway to methionine, catalysed by betaine-homocysteine-methyltransferase within the liver. As a consequence NADPH oxidase 4-null mice display significantly lowered plasma homocysteine and the flux of homocysteine through the transsulfuration pathway is reduced, resulting in lower hepatic cysteine and glutathione levels. Mice deficient in NADPH oxidase 4 had markedly increased susceptibility to acetaminophen-induced hepatic injury which could be corrected by administration of N-acetyl cysteine. We thus conclude that under physiological conditions, NADPH oxidase 4-derived reactive oxygen species is a regulator of the partitioning of the metabolic flux of homocysteine, which impacts upon hepatic cysteine and glutathione levels and thereby upon defence against environmental toxins.
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Affiliation(s)
- Thomas V A Murray
- Cardiovascular Division, King's College London, 125 Coldharbour Lane, London E5 0AD
| | - Xuebin Dong
- Cardiovascular Division, King's College London, 125 Coldharbour Lane, London E5 0AD
| | - Greta J Sawyer
- Cardiovascular Division, King's College London, 125 Coldharbour Lane, London E5 0AD
| | - Anna Caldwell
- Mass Spectrometry Facility, King's College London, FWB, 150 Stamford Street London E1 9NH
| | - John Halket
- Mass Spectrometry Facility, King's College London, FWB, 150 Stamford Street London E1 9NH
| | - Roy Sherwood
- NHS Foundation Trust, King's College Hospital, Denmark Hill, London SE5 9RS
| | - Alberto Quaglia
- Institute of Liver Studies, King's College London, Denmark Hill, London SE5 9RS
| | - Tracy Dew
- NHS Foundation Trust, King's College Hospital, Denmark Hill, London SE5 9RS
| | - Narayana Anilkumar
- Cardiovascular Division, King's College London, 125 Coldharbour Lane, London E5 0AD
| | - Simon Burr
- Cardiovascular Division, King's College London, 125 Coldharbour Lane, London E5 0AD
| | - Rajesh K Mistry
- Cardiovascular Division, King's College London, 125 Coldharbour Lane, London E5 0AD
| | - Daniel Martin
- Cardiovascular Division, King's College London, 125 Coldharbour Lane, London E5 0AD
| | - Katrin Schröder
- Institut für Kardiovaskuläre Physiologie, Goethe-Universität, 60596 Frankfurt am Main, Germany
| | - Ralf P Brandes
- Institut für Kardiovaskuläre Physiologie, Goethe-Universität, 60596 Frankfurt am Main, Germany
| | - Robin D Hughes
- Institute of Liver Studies, King's College London, Denmark Hill, London SE5 9RS
| | - Ajay M Shah
- Cardiovascular Division, King's College London, 125 Coldharbour Lane, London E5 0AD
| | - Alison C Brewer
- Cardiovascular Division, King's College London, 125 Coldharbour Lane, London E5 0AD.
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Xie Z, Gong H, Liu M, Zhu H, Sun H. The properties of mesoporous silica nanoparticles functionalized with different PEG-chain lengthviathe disulfide bond linker and drug release in glutathione medium. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2015; 27:55-68. [DOI: 10.1080/09205063.2015.1107708] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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